Masturbation in the Animal Kingdom

References

• Altmann, M. (1952). Social behavior of elk, Cervus canadensis nelsoni, in the Jackson Hole area of Wyoming. Behaviour, 4(2), 116–143. https://doi.org/10.1163/156853951X00089
   Web of Science ®Google Scholar
• Bagemihl, B. (2012). Biological exuberance: Animal homosexuality and natural diversity (1st eBook ed.). St. Martin’s Press.
   Google Scholar
• Baker, R. R., & Bellis, M. A. (1993a). Human sperm competition: Ejaculate adjustment by males and the function of masturbation. Animal Behaviour, 46(5), 861–885. https://doi.org/10.1006/anbe.1993.1271
   Web of Science ®Google Scholar
• Baker, R. R., & Bellis, M. A. (1993b). Human sperm competition: Ejaculate manipulation by females and a function for the female orgasm. Animal Behaviour, 46(5), 887–909. https://doi.org/10.1006/anbe.1993.1272
   Web of Science ®Google Scholar
• Baker, A. M., & Gonyou, H. W. (1986). Effects of zeranol implantation and late gastration on sexual, agonistic and handling behavior in male feedlot cattle. Journal of Animal Science, 62(5), 1224–1232. https://doi.org/10.2527/jas1986.6251224x
   PubMed Web of Science ®Google Scholar
• Beaver, B. V. (1977a). Mating behavior in the cat. The Veterinary Clinics of North America, 7(4), 729–733. https://doi.org/10.1016/S0091-0279(77)50085-8
   PubMedGoogle Scholar
• Beaver, B. V. (1977b). Mating behavior in the dog. The Veterinary Clinics of North America, 7(4), 723–728. https://doi.org/10.1016/S0091-0279(77)50084-6
   PubMedGoogle Scholar
• Beck, B. B., & Power, M. L. (1988). Correlates of sexual and maternal competence in captive gorillas. Zoo Biology, 7(4), 339–350. https://doi.org/10.1002/zoo.1430070405
   Web of Science ®Google Scholar
• Biedermann, S. V., Auer, M. K., Bindila, L., Ende, G., Lutz, B., Weber-Fahr, W., Gass, P., & Fuss, J. (2016). Restricted vs. unrestricted wheel running in mice: Effects on brain, behavior and endocannabinoids. Hormones and Behavior, 86, 45–54. https://doi.org/10.1016/j.yhbeh.2016.09.007
   PubMed Web of Science ®Google Scholar
• Bielert, C., & Van der Walt, L. A. (1982). Male chacma baboon (Papio ursinus) sexual arousal: Mediation by visual cues from female conspecifics. Psychoneuroendocrinology, 7(1), 31–48. https://doi.org/10.1016/0306-4530(82)90053-1
   PubMed Web of Science ®Google Scholar
• Bitran, D., & Sachs, B. D. (1989). Penile desensitization does not affect postcopulatory genital autogrooming in rats: Evidence for central motor patterning. Physiology & Behavior, 45(5), 1001–1006. https://doi.org/10.1016/0031-9384(89)90228-X
   PubMed Web of Science ®Google Scholar
• Boyd, L. E. (1986). Behavior problems of equids in zoos. The Veterinary Clinics of North America. Equine Practice, 2(3), 653–664. https://doi.org/10.1016/S0749-0739(17)30713-7
   PubMed Web of Science ®Google Scholar
• Boyd, L. E. (1991). The behaviour of Przewalski’s horses and its importance to their management. Applied Animal Behaviour Science, 29(1–4), 301–318. https://doi.org/10.1016/0168-1591(91)90256-W
   Web of Science ®Google Scholar
• Boyd, L. E., & Houpt, K. A. (1994). Activity patterns. In L. Boyd and K. A. Houpt (Eds.), Przewalski’s Horse: The history and biology of an endangered species (pp. 195–227). State University of New York Press.
   Google Scholar
• Brindle, M., Thomsen, R., Cowlishaw, G., & Sommer, V. (2019, February 11). Masturbation in primates: Phylogeny and functions. Poster presented at the 16th Conference, Gesellschaft für Primatologie, Göttingen, Germany.
   Google Scholar
• Brody, S. (2010). The relative health benefits of different sexual activities. The Journal of Sexual Medicine, 7(4), 1336–1361. https://doi.org/10.1111/j.1743-6109.2009.01677.x
   PubMed Web of Science ®Google Scholar
• Buechner, H. K., & Mackler, S. F. (1978). Breeding behaviour in captive Indian rhinoceros. Der Zoologische Garten, 48(5/6), 305–322.
   Google Scholar
• Buisson, O., & Jannini, E. A. (2013). Pilot echographic study of the differences in clitoral involvement following clitoral or vaginal sexual stimulation. The Journal of Sexual Medicine, 10(11), 2734–2740. https://doi.org/10.1111/jsm.12279
   PubMed Web of Science ®Google Scholar
• Bullough, V. L. (2003). Masturbation: A historical overview. Journal of Psychology & Human Sexuality, 14(2–3), 17–33. https://doi.org/10.1300/J056v14n02_03
   Google Scholar
• Burton, F. D. (1970). Sexual climax in female Macaca mulatta. Proceedings of the Third International Congress of Primatology, 3, 180–191. Karger, Basel.
   Google Scholar
• Cenni, C., Casarrubea, M., Gunst, N., Vasey, P. L., Pellis, S. M., Wandia, I. N., & Leca, J.-B. (2020). Inferring functional patterns of tool use behavior from the temporal structure of object play sequences in a non-human primate species. Physiology & Behavior, 222, 112938. https://doi.org/10.1016/j.physbeh.2020.112938
   PubMed Web of Science ®Google Scholar
• Chevalier-Skolnikoff, S. (1974). Male-Female, female-female, and male-male sexual behavior in the stumptail monkey, with special attention to the female orgasm. Archives of Sexual Behavior, 3(2), 95–116. https://doi.org/10.1007/BF01540994
   PubMed Web of Science ®Google Scholar
• Choi, Y. J., Lee, W. H., Rha, K. H., Xin, Z. C., Choi, Y. D., & Choi, H. K. (2000). Masturbation and its relationship to sexual activities of young males in Korean military service. Yonsei Medical Journal, 41(2), 205. https://doi.org/10.3349/ymj.2000.41.2.205
   PubMed Web of Science ®Google Scholar
• Coblentz, B. E. (1976). Functions of scent-urination in ungulates with special reference to feral goats (Capra hircus L.). The American Naturalist, 110(974), 549–557. https://doi.org/10.1086/283090
   Web of Science ®Google Scholar
• Davidson, J. K., Moore, N. B., & Ullstrup, K. M. (2004). Religiosity and sexual responsibility: Relationships of choice. American Journal of Health Behavior, 28(4), 335–346. https://doi.org/10.5993/AJHB.28.4.5
   PubMed Web of Science ®Google Scholar
• De la Garza-Mercer, F. (2007). The evolution of sexual pleasure. Journal of Psychology & Human Sexuality, 18(2–3), 107–124. https://doi.org/10.1300/J056v18n02_04
   Google Scholar
• De Waal, F. B. M. (1995). Sex as an alternative to aggression in the bobobo. In P. R. Abramson and S. D. Pinkerton (Eds.), Sexual nature, sexual culture (pp. 37–56). University of Chicago Press.
   Google Scholar
• DiMarzo, V., Goparaju, S. K., Wang, L., Liu, J., Bátkai, S., Járai, Z., Fezza, F., Miura, G. I., Palmiter, R. D., Sugiura, T., & Kunos, G. (2001). Leptin-regulated endocannabinoids are involved in maintaining food intake. Nature, 410(6830), 822–825. https://doi.org/10.1038/35071088
   PubMed Web of Science ®Google Scholar
• Dixson, A. F. (2012). Primate sexuality: Comparative studies of the prosimians, monkeys, apes, and humans (2nd ed.). Oxford University Press.
   Google Scholar
• Dixson, A. F., & Anderson, M. J. (2004). Sexual behavior, reproductive physiology and sperm competition in male mammals. Physiology & Behavior, 83(2), 361–371. https://doi.org/10.1016/j.physbeh.2004.08.022
   PubMed Web of Science ®Google Scholar
• Dubuc, C., Coyne, S. P., & Maestripieri, D. (2013). Effect of mating activity and dominance rank on male masturbation among free-ranging male Rhesus macaques. Ethology, 119(11). https://doi.org/10.1111/eth.12146
   Web of Science ®Google Scholar
• Ellis, H. (1942). Studies in the psychology of sex: Volume 1. The evolution of modesty, the phenomena of sexual periodicity, auto-erotism (3rd ed.). Random House.
   Google Scholar
• Feist, J., & McCullough, D. Behavior patterns and communication in feral horses. (1976). Zeitschrift Fur Tierpsychologie, 41(4), 337–371. PubMed. https://doi.org/10.1111/j.1439-0310.1976.tb00947.x
   PubMedGoogle Scholar
• Ficken, M. S., & Dilger, W. C. (1960). Comments on redirection with examples of avian copulations with substitute objects. Animal Behaviour, 8(3–4), 219–222. https://doi.org/10.1016/0003-3472(60)90030-0
   Google Scholar
• Ford, C. S., & Beach, F. A. (1951). Patterns of sexual behavior. Harper & Brothers, Publishers.
   Google Scholar
• Fox, C. A., Wolff, H. S., & Baker, J. A. (1970). Measurement of intra-vaginal and intra-uterine pressures during human coitus by radio-telemetry. Journal of Reproduction and Fertility, 22, 243–251. https://doi.org/10.1530/jrf.0.0220243
   PubMedGoogle Scholar
• Frith, C. B., & Frith, D. W. (1993). Courtship display of the Tooth-billed Bowerbird Scenopoeetes dentirostris and its behavioural and systematic significance. Emu - Austral Ornithology, 93(3), 129–136. https://doi.org/10.1071/MU9930129
   Web of Science ®Google Scholar
• Frith, C. B., & Frith, D. W. (1997). Courtship and mating of the King of Saxony bird of paradise Pteridophora alberti in New Guinea with comment on their taxonomic significance. Emu - Austral Ornithology, 97(3), 185–193. http://dx.doi.org/10.1071/MU97025
   Google Scholar
• Fuss, J., Bindila, L., Wiedemann, K., Auer, M. K., Briken, P., & Biedermann, S. V. (2017). Masturbation to orgasm stimulates the release of the endocannabinoid 2-arachidonoylglycerol in humans. The Journal of Sexual Medicine, 14(11), 1372–1379. https://doi.org/10.1016/j.jsxm.2017.09.016
   PubMed Web of Science ®Google Scholar
• Fuss, J., Steinle, J., Bindila, L., Auer, M. K., Kirchherr, H., Lutz, B., & Gass, P. (2015). A runner’s high depends on cannabinoid receptors in mice. Proceedings of the National Academy of Sciences, 112(42), 13105–13108. https://doi.org/10.1073/pnas.1514996112
   PubMed Web of Science ®Google Scholar
• Georgiadis, J. R., Kringelbach, M. L., & Pfaus, J. G. (2012). Sex for fun: A synthesis of human and animal neurobiology. Nature Reviews. Urology, 9(9), 486–498. https://doi.org/10.1038/nrurol.2012.151
   PubMed Web of Science ®Google Scholar
• Gerressu, M., Mercer, C. H., Graham, C. A., Wellings, K., & Johnson, A. M. (2008). Prevalence of masturbation and associated factors in a British national probability survey. Archives of Sexual Behavior, 37(2), 266–278. https://doi.org/10.1007/s10508-006-9123-6
   PubMed Web of Science ®Google Scholar
• Goldfoot, D., Westerborg van Loon, H., Groeneveld, W., & Slob, A. (1980). Behavioral and physiological evidence of sexual climax in the female stump-tailed macaque (Macaca arctoides). Science, 208(4451), 1477–1479. https://doi.org/10.1126/science.7384791
   PubMed Web of Science ®Google Scholar
• Goodall, J. (1986). The chimpanzees of Gombe: Patterns of behavior. Belknap Press of Harvard University Press.
   Google Scholar
• Greenberg, J. S., & Archambault, F. X. (1973). Masturbation, self‐esteem and other variables. Journal of Sex Research, 9(1), 41–51. https://doi.org/10.1080/00224497309550777
   Google Scholar
• Greenhall, A. M. (1965). Notes on behavior of captive vampire bats. Mammalia, 29(4. https://doi.org/10.1515/mamm.1965.29.4.441
   Google Scholar
• Haas, G. (1959). Untersuchungen über angeborene Verhaltensweisen bei Mähnenspringern (Ammotragus lervia Pallas). Zeitschrift Für Tierpsychologie, 16(2), 218–242. https://doi.org/10.1111/j.1439-0310.1959.tb02054.x
   Google Scholar
• Habibi, K. (1987). Behavior of aoudad (Ammotragus lervia) during the rutting season. Mammalia, 51(4). https://doi.org/10.1515/mamm.1987.51.4.497
   Web of Science ®Google Scholar
• Harrison, R. J., & Ridgwa, S. H. (2009). Gonadal activity in some bottlenose dolphins (Tursiops truncatus). Journal of Zoology, 165(3), 355–366. https://doi.org/10.1111/j.1469-7998.1971.tb02193.x
   Google Scholar
• Hart, B. L., & Haugen, C. M. (1971). Prevention of genital grooming in mating behaviour of male rats (Rattus norvegicus). Animal Behaviour, 19(2), 230–232. https://doi.org/10.1016/S0003-3472(71)80003-9
   Web of Science ®Google Scholar
• Hart, B. L., Korinek, E., & Brennan, P. (1987). Postcopulatory genital grooming in male rats: Prevention of sexually transmitted infections. Physiology & Behavior, 41(4), 321–325. https://doi.org/10.1016/0031-9384(87)90395-7
   PubMed Web of Science ®Google Scholar
• Hengjan, Y., Iida, K., Doysabas, K. C. C., Phichitrasilp, T., Ohmori, Y., & Hondo, E. (2017). Diurnal behavior and activity budget of the golden-crowned flying fox (Acerodon jubatus) in the Subic bay forest reserve area, the Philippines. Journal of Veterinary Medical Science, 79(10), 1667–1674. https://doi.org/10.1292/jvms.17-0329
   PubMed Web of Science ®Google Scholar
• Herbenick, D., Bowling, J., Fu, T.-C., Dodge, B., Guerra-Reyes, L., Sanders, S., & Xu, J. (2017). Sexual diversity in the United States: Results from a nationally representative probability sample of adult women and men. Plos One, 12(7), e0181198. https://doi.org/10.1371/journal.pone.0181198
   PubMed Web of Science ®Google Scholar
• Ishikawa, A., Sakamoto, H., Katagiri, S., & Takahashi, Y. (2003). Changes in sexual behavior and fecal steroid hormone concentrations during the breeding season in female Hokkaido brown bears (Ursus arctos yesoensis) under captive condition. Journal of Veterinary Medical Science, 65(1), 99–102. https://doi.org/10.1292/jvms.65.99
   PubMed Web of Science ®Google Scholar
• Jainudeen, M. R., Katongole, C. B., & Short, R. V. (1972). Plasma testosterone levels in relation to musth and sexual activity in the male Asiatic elephant, Elephas maximus. Reproduction, 29(1), 99–103. https://doi.org/10.1530/jrf.0.0290099
   Web of Science ®Google Scholar
• Jannini, E. A., Buisson, O., & Rubio-Casillas, A. (2014). Beyond the G-spot: Clitourethrovaginal complex anatomy in female orgasm. Nature Reviews. Urology, 11(9), 531–538. https://doi.org/10.1038/nrurol.2014.193
   PubMed Web of Science ®Google Scholar
• Keverne, E. B. (1976). Sex attractants in primates. Journal of the Society of Cosmetic Chemists, 27(6), 257–269.
   PubMed Web of Science ®Google Scholar
• Kinsey, A. C., Pomeroy, W. B., & Martin, C. E. (1948). Sexual behavior in the human male. 7th print. Saunders Co.
   Google Scholar
• Kinsey, A. C., Pomeroy, W. B., Martin, C. E., & Gebhard, P. H. (1953). Sexual behavior in the human female. Saunders Co. Reprint.
   Google Scholar
• Kollar, E. J., Beckwith, W. C., & Edgerton, R. B. (1968). Sexual behavior of the ARL colony chimpanzees. The Journal of Nervous and Mental Disease, 147(5), 444–459. https://doi.org/10.1097/00005053-196811000-00002
   PubMed Web of Science ®Google Scholar
• Komisaruk, B. R. (2016). Commentary on “the evolutionary origin of female orgasm” by M. Pavlicev and G. Wagner, 2016. Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution, 326(8), 504–506. https://doi.org/10.1002/jez.b.22712
   PubMed Web of Science ®Google Scholar
• Kontula, O., & Haavio-Mannila, E. (2003). Masturbation in a generational perspective. Journal of Psychology & Human Sexuality, 14(2–3), 49–83. https://doi.org/10.1300/J056v14n02_05
   Google Scholar
• Kraus, F. (2017). The practice of masturbation for women: The end of a taboo? Sexologies, 26(4), e35–e41. https://doi.org/10.1016/j.sexol.2017.09.009
   Web of Science ®Google Scholar
• Larsson, K., & Södersten, P. (1973). Mating in male rats after section of the dorsal penile nerve. Physiology & Behavior, 10(3), 567–571. https://doi.org/10.1016/0031-9384(73)90223-0
   PubMed Web of Science ®Google Scholar
• Leitzmann, M. F. (2004). Ejaculation frequency and subsequent risk of prostate cancer. JAMA, 291(13), 1578. https://doi.org/10.1001/jama.291.13.1578
   PubMed Web of Science ®Google Scholar
• Levin, R. J. (2007). Sexual activity, health and well-being – the beneficial roles of coitus and masturbation. Sexual and Relationship Therapy, 22(1), 135–148. https://doi.org/10.1080/14681990601149197
   Google Scholar
• Lincoln, G. A. (1972). The role of antlers in the behaviour of red deer. The Journal of Experimental Zoology, 182(2), 233–249. https://doi.org/10.1002/jez.1401820208
   Google Scholar
• Linnankoski, I., Grönroos, M., & Pertovaara, A. (1993). Eye contact as a trigger of male sexual arousal in stump-tailed macaques (Macaca arctoides). Folia Primatologica, 60(3), 181–184. https://doi.org/10.1159/000156689
   PubMed Web of Science ®Google Scholar
• Linnankoski, I., Hytönen, Y., Leinonen, L., & Hyvärinen, J. (1981). Determinants of sexual behavior of Macaca arctoides in a laboratory colony. Archives of Sexual Behavior, 10(2), 207–222. https://doi.org/10.1007/BF01542179
   PubMed Web of Science ®Google Scholar
• Lloyd, E. A. (2005). The case of the female orgasm: Bias in the science of evolution. Harvard University Press.
   Google Scholar
• Lloyd, E. A. (2006). Response to Puts and Dawood’s ‘the evolution of female orgasm: Adaptation or byproduct?’—been there. Twin Research and Human Genetics, 9(4), 603–608. https://doi.org/10.1375/twin.9.4.603
   PubMed Web of Science ®Google Scholar
• Maestripieri, D., Schino, G., Aureli, F., & Troisi, A. (1992). A modest proposal: Displacement activities as an indicator of emotions in primates. Animal Behaviour, 44(5), 967–979. https://doi.org/10.1016/S0003-3472(05)80592-5
   Web of Science ®Google Scholar
• Marchinton, R. L., & Moore, W. G. (1971). Auto-erotic behavior in male white-tailed deer. Journal of Mammalogy, 52(3), 616–617. https://doi.org/10.2307/1378600
   Web of Science ®Google Scholar
• McBride, A. F., & Hebb, D. O. (1948). Behavior of the captive bottle-nose dolphin, Tursiops truncatus. Journal of Comparative and Physiological Psychology, 41(2), 111–123. https://doi.org/10.1037/h0057927
   PubMed Web of Science ®Google Scholar
• McBride, A. F., & Kritzler, H. (1951). Observations on pregnancy, parturition, and postnatal behavior in the bottlenose dolphin. Journal of Mammalogy, 32(3), 251. https://doi.org/10.2307/1375657
   Web of Science ®Google Scholar
• McDonnell, S. (1986). Reproductive behavior of the stallion. The Veterinary Clinics of North America. Equine Practice, 2(3), 535–555. https://doi.org/10.1016/S0749-0739(17)30705-8
   PubMed Web of Science ®Google Scholar
• Mercer, C. H., Tanton, C., Prah, P., Erens, B., Sonnenberg, P., Clifton, S., Macdowall, W., Lewis, R., Field, N., Datta, J., Copas, A. J., Phelps, A., Wellings, K., & Johnson, A. M. (2013). Changes in sexual attitudes and lifestyles in Britain through the life course and over time: Findings from the National Surveys of Sexual Attitudes and Lifestyles (Natsal). The Lancet, 382(9907), 1781–1794. https://doi.org/10.1016/S0140-6736(13)62035-8
   PubMed Web of Science ®Google Scholar
• Miller, E. H. (1975). Walrus ethology. I. the social role of tusks and applications of multidimensional scaling. Canadian Journal of Zoology, 53(5), 590–613. https://doi.org/10.1139/z75-073
   Web of Science ®Google Scholar
• Monteleone, P., Piscitelli, F., Scognamiglio, P., Monteleone, A. M., Canestrelli, B., DiMarzo, V., & Maj, M. (2012). Hedonic eating is associated with increased peripheral levels of ghrelin and the endocannabinoid 2-arachidonoyl-glycerol in healthy humans: A pilot study. The Journal of Clinical Endocrinology & Metabolism, 97(6), E917–E924. https://doi.org/10.1210/jc.2011-3018
   PubMed Web of Science ®Google Scholar
• Mootnick, A. R., & Baker, E. (1994). Masturbation in captive Hylobates (gibbons). Zoo Biology, 13(4), 345–353. https://doi.org/10.1002/zoo.1430130408
   Web of Science ®Google Scholar
• Nieuwenhuijsen, K. (1987). Testosterone, testis size, seasonality, and behavior in group-living stumptail macaques (Macaca arctoides). Hormones and Behavior, 21(2), 153–169. https://doi.org/10.1016/0018-506X(87)90041-9
   PubMed Web of Science ®Google Scholar
• Nieuwenhuijsen, K., de Neef, K. J., & Slob, A. K. (1986). Sexual behaviour during ovarian cycles, pregnancy and lactation in group-living stumptail macaques {macaca arctoides). Human Reproduction, 1(3), 159–169. https://doi.org/10.1093/oxfordjournals.humrep.a136373
   PubMed Web of Science ®Google Scholar
• O’Connell, H. E., & DeLancey, J. O. L. (2005). Clitoral anatomy in nulliparous, healthy, premenopausal volunteers using unenhanced magnetic resonance imaging. The Journal of Urology, 173(6), 2060–2063. https://doi.org/10.1097/01.ju.0000158446.21396.c0
   PubMed Web of Science ®Google Scholar
• O’Connell, H. E., Sanjeevan, K. V., & Hutson, J. M. (2005). Anatomy of the clitoris. The Journal of Urology, 174(4 Part 1), 1189–1195. https://doi.org/10.1097/01.ju.0000173639.38898.cd
   PubMed Web of Science ®Google Scholar
• Ostrander, N. (2009). Sexual pursuits of pleasure among men and women with spinal cord injuries. Sexuality and Disability, 27(1), 11–19. https://doi.org/10.1007/s11195-008-9103-y
   Web of Science ®Google Scholar
• Parada, M., Abdul-Ahad, F., Censi, S., Sparks, L., & Pfaus, J. G. (2011). Context alters the ability of clitoral stimulation to induce a sexually-conditioned partner preference in the rat. Hormones and Behavior, 59(4), 520–527. https://doi.org/10.1016/j.yhbeh.2011.02.001
   PubMed Web of Science ®Google Scholar
• Parada, M., Chamas, L., Censi, S., Coria-Avila, G., & Pfaus, J. G. (2010). Clitoral stimulation induces conditioned place preference and Fos activation in the rat. Hormones and Behavior, 57(2), 112–118. https://doi.org/10.1016/j.yhbeh.2009.05.008
   PubMed Web of Science ®Google Scholar
• Parada, M., Jafari, N., & Pfaus, J. G. (2013). Sexual experience blocks the ability of clitoral stimulation to induce a conditioned place preference in the rat. Physiology & Behavior, 119, 97–102. https://doi.org/10.1016/j.physbeh.2013.06.005
   PubMed Web of Science ®Google Scholar
• Parker, G. A. (1970). Sperm competition and its evolutionary consequences in the insects. Biological Reviews, 45(4), 525–567. https://doi.org/10.1111/j.1469-185X.1970.tb01176.x
   Web of Science ®Google Scholar
• Parker, K. J., Buckmaster, C. L., Schatzberg, A. F., & Lyons, D. M. (2005). Intranasal oxytocin administration attenuates the ACTH stress response in monkeys. Psychoneuroendocrinology, 30(9), 924–929. https://doi.org/10.1016/j.psyneuen.2005.04.002
   PubMed Web of Science ®Google Scholar
• Pavličev, M., & Wagner, G. (2016). The evolutionary origin of female orgasm: Evolution of female orgasm. Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution, 326(6), 326–337. https://doi.org/10.1002/jez.b.22690
   PubMed Web of Science ®Google Scholar
• Penzhorn, B. (1984). A long‐term study of social organisation and behaviour of Cape mountain zebras Equus zebra zebra. Zeitschrift Für Tierpsychologie, 64(2), 97–146. https://doi.org/10.1111/j.1439-0310.1984.tb00355.x
   Google Scholar
• Pfaus, J. G. (2009). Reviews: Pathways of sexual desire. The Journal of Sexual Medicine, 6(6), 1506–1533. https://doi.org/10.1111/j.1743-6109.2009.01309.x
   PubMed Web of Science ®Google Scholar
• Pfaus, J. G., Scardochio, T., Parada, M., Gerson, C., Quintana, G. R., & Coria-Avila, G. A. (2016). Do rats have orgasms? Socioaffective Neuroscience & Psychology, 6(1), 31883. https://doi.org/10.3402/snp.v6.31883
   PubMed Web of Science ®Google Scholar
• Post, W. (1994). Redirected copulation by male Boat-tailed Grackles. Wilson Bulletin, 106(4), 770–771.
   Google Scholar
• Puts, D. A., & Dawood, K. (2006). The evolution of female orgasm: Adaptation or byproduct? Twin Research and Human Genetics, 9(3), 467–472. https://doi.org/10.1375/twin.9.3.467
   PubMed Web of Science ®Google Scholar
• Raichlen, D. A., Foster, A. D., Gerdeman, G. L., Seillier, A., & Giuffrida, A. (2012). Wired to run: Exercise-induced endocannabinoid signaling in humans and cursorial mammals with implications for the “runner’s high. The Journal of Experimental Biology, 215(8), 1331–1336. https://doi.org/10.1242/jeb.063677
   PubMed Web of Science ®Google Scholar
• Rijksen, H. D. (1978). A field study on Sumatran orang utans (Pongo pygmaeus abelii Lesson 1827): Ecology, behaviour and conservation [Dissertation].
   Google Scholar
• Riley, A. J., & Riley, E. J. (1978). A controlled study to evaluate directed masturbation in the management of primary orgasmic failure in women. British Journal of Psychiatry, 133(5), 404–409. https://doi.org/10.1192/bjp.133.5.404
   PubMed Web of Science ®Google Scholar
• Ritz, J., Griebeler, E., Huber, R., & Clauss, M. (2010). Body size development of captive and free-ranging African spurred tortoises (Geochelone sulcata): High plasticity in reptilian growth rates. The Herpetological Journal, 20, 213–216. https://doi.org/10.5167/uzh-36147
   Web of Science ®Google Scholar
• Rowell, T. E., & Hartwell, K. M. (1978). The interaction of behavior and reproductive cycles in patas monkeys. Behavioral Biology, 24(2), 141–167. https://doi.org/10.1016/S0091-6773(78)93032-8
   PubMedGoogle Scholar
• Rowland, D. L., & Cooper, S. E. (2017). Treating men’s orgasmic difficulties. In Z. D. Peterson (Ed.), The Wiley handbook of sex therapy (pp. 72–97). John Wiley & Sons Ltd.
   Google Scholar
• Rowland, D. L., Kolba, T. N., McNabney, S. M., Uribe, D., & Hevesi, K. (2020). Why and how women masturbate, and the relationship to orgasmic response. Journal of Sex & Marital Therapy, 46(4), 361–376. https://doi.org/10.1080/0092623X.2020.1717700
   PubMed Web of Science ®Google Scholar
• Russell, D. G. D., Sladen, W. J. L., & Ainley, D. G. (2012). Dr. George Murray Levick (1876–1956): Unpublished notes on the sexual habits of the Adélie penguin. The Polar Record, 48(4), 387–393. https://doi.org/10.1017/S0032247412000216
   Web of Science ®Google Scholar
• Sachs, B. D., Clark, J. T., Molloy, A. G., Bitran, D., & Holmes, G. M. (1988). Relation of autogrooming to sexual behavior in male rats. Physiology & Behavior, 43(5), 637–643. https://doi.org/10.1016/0031-9384(88)90219-3
   PubMed Web of Science ®Google Scholar
• Sannen, A., van Elsacker, L., Heistermann, M., & Eens, M. (2005). Certain aspects of bonobo female sexual repertoire are related to urinary testosterone metabolite levels. Folia Primatologica, 76(1), 21–32. https://doi.org/10.1159/000082452
   PubMed Web of Science ®Google Scholar
• Schürmann, C. (1982). Mating behaviour of wild orangutans. In L. E. M. de Boer (Ed.), The orangutan: Its biology and conservation (pp. 269–284). Springer Netherlands.
   Google Scholar
• Shadle, A. R. (1946). Copulation in the Porcupine. The Journal of Wildlife Management, 10(2), 159. https://doi.org/10.2307/3796077
   Web of Science ®Google Scholar
• Shadle, A. R., Smelzer, M., & Metz, M. (1946). The sex reactions of porcupines (Erethizon d. Dorsatum) before and after copulation. Journal of Mammalogy, 27(2), 116. https://doi.org/10.2307/1375229
   Web of Science ®Google Scholar
• Shank, C. C. (1972). Some aspects of social behaviour in a population of feral goats (Capra hircus L.). Zeitschrift Für Tierpsychologie, 30(5), 488–528. https://doi.org/10.1111/j.1439-0310.1972.tb00876.x
   Google Scholar
• Shulman, J. L., & Horne, S. G. (2003). The use of self-pleasure: Masturbation and body image among African American and European American women. Psychology of Women Quarterly, 27(3), 262–269. https://doi.org/10.1111/1471-6402.00106
   Web of Science ®Google Scholar
• Siebers, M., Biedermann, S. V., Bindila, L., Lutz, B., & Fuss, J. (2021). Exercise-Induced euphoria and anxiolysis do not depend on endogenous opioids in humans. Psychoneuroendocrinology, 126, 105173. https://doi.org/10.1016/j.psyneuen.2021.105173
   PubMed Web of Science ®Google Scholar
• Sinha, A. (1997). Complex tool manufacture by a wild bonnet macaque, Macaca radiata. Folia Primatologica, 68, 23–25. https://doi.org/10.1159/000157227
   Web of Science ®Google Scholar
• Slob, A. K., Groeneveld, W. H., & Van Der Werff Ten Bosch, J. J. (1986). Physiological changes during copulation in male and female stumptail macaques (Macaca arctoides). Physiology & Behavior, 38(6), 891–895. https://doi.org/10.1016/0031-9384(86)90059-4
   PubMed Web of Science ®Google Scholar
• Snow, B. K. (2008). Lek behaviour and breeding of Guy’s Hermit Hummingbird Phaethornis guy. The Ibis, 116(3), 278–297. https://doi.org/10.1111/j.1474-919X.1974.tb00125.x
   Web of Science ®Google Scholar
• Sommer, V., Thomsen, R., & Brindle, M. (2022). Masturbation in primates. In T. K. Shackelford (Ed.), The Cambridge Handbook of Evolutionary Perspectives on Sexual Psychology: Volume 4, Controversies, Applications, and Non-Human Primate Extensions. Cambridge University Press.
   Google Scholar
• Starin, E. D. (2004). Masturbation observations in temminck’s red colobus. Folia Primatologica, 75(2), 114–117. https://doi.org/10.1159/000076273
   PubMed Web of Science ®Google Scholar
• Suarez, S. S., & Pacey, A. A. (2006). Sperm transport in the female reproductive tract. Human Reproduction Update, 12(1), 23–37. https://doi.org/10.1093/humupd/dmi047
   PubMed Web of Science ®Google Scholar
• Tavares, M. C., Topic, B., Abreu, C., Waga, I., Gomes, Ú., Tomaz, C., & Mattern, C. (2007). Effects of intra-nasally administered testosterone on sexual proceptive behavior in female capuchin monkeys (Cebus apella). Behavioural Brain Research, 179(1), 33–42. https://doi.org/10.1016/j.bbr.2007.01.004
   PubMed Web of Science ®Google Scholar
• Tepper, M. S. (2000). Sexuality and disability: The missing discourse of pleasure. Sexuality and Disability, 18(4), 283–290. https://doi.org/10.1023/A:1005698311392
   Web of Science ®Google Scholar
• Thomsen, R. (2001). Sperm competition and the function of masturbation in Japanese macaques (Macaca fuscata) (0001/UMC 12119) [Dissertation, Ludwig-Maximilians-Universität München]. http://nbn-resolving.de/urn:nbn:de:bvb:19-1059
   Google Scholar
• Thomsen, R., & Soltis, J. (2004). Male masturbation in free-ranging Japanese macaques. International Journal of Primatology, 25(5), 1033–1041. https://doi.org/10.1023/B:IJOP.0000043350.75897.89
   Web of Science ®Google Scholar
• Thomsen, R., Soltis, J., Matsubara, M., Matsubayashi, K., Onuma, M., & Takenaka, O. (2006). How costly are ejaculates for Japanese macaques? Primates, 47(3), 272–274. https://doi.org/10.1007/s10329-005-0171-7
   PubMed Web of Science ®Google Scholar
• Thomsen, R., & Sommer, V. (2015). Masturbation (nonhuman primates). In A. Bolin and P. Whelehan (Eds.), The international encyclopedia of human sexuality (pp. 721–817). John Wiley & Sons, Ltd. https://doi.org/10.1002/9781118896877.wbiehs289
   Google Scholar
• Thomsen, R., & Sommer, V., (2017). Masturbation. In Bezanson, M., MacKinnon, K. C., Riley, E., Campbell, C. J., Nekaris, K. A. I. A., Estrada, A., DiFiore, A. F., Ross, S., Jones-Engel, L. E., Thierry, B., Sussman, R. W., Sanz, C., Loudon, J., Elton, S, A. Fuentes (Ed.), The international encyclopedia of primatology (pp. 1–2). John Wiley & Sons, Inc. https://doi.org/10.1002/9781119179313.wbprim0293
   Google Scholar
• Tinbergen, N. (1963). On aims and methods of ethology. Zeitschrift Für Tierpsychologie, 20(4), 410–433. https://doi.org/10.1111/j.1439-0310.1963.tb01161.x
   Google Scholar
• Tissot. (1832). Treatise on the diseases produced by onanism. Collins & Hannay.
   Google Scholar
• Trezza, V., Baarendse, P. J. J., & Vanderschuren, L. J. M. J. (2010). The pleasures of play: Pharmacological insights into social reward mechanisms. Trends in Pharmacological Sciences, 31(10), 463–469. https://doi.org/10.1016/j.tips.2010.06.008
   PubMed Web of Science ®Google Scholar
• Wallen, K. (1990). Desire and ability: Hormones and the regulation of female sexual behavior. Neuroscience & Biobehavioral Reviews, 14(2), 233–241. https://doi.org/10.1016/S0149-7634(05)80223-4
   PubMed Web of Science ®Google Scholar
• Wallen, K. (1995). The evolution of female sexual desire. In P. R. Abramson and S. D. Pinkerton (Eds.), Sexual nature, sexual culture (pp. 57–79). University of Chicago Press.
   Google Scholar
• Wallen, K. (2020). Protection or pleasure: The role of genital arousal in sexual intercourse. Archives of Sexual Behavior. https://doi.org/10.1007/s10508-020-01869-7
   Web of Science ®Google Scholar
• Wang, X., & Hoffmann, R. S. (1987). Pseudois nayaur and Pseudois schaeferi. Mammalian Species, 278, 1. https://doi.org/10.2307/3503993
   Google Scholar
• Waterman, J. M. (2010). The adaptive function of masturbation in a promiscuous African ground squirrel. PLoS ONE, 5(9), e13060. https://doi.org/10.1371/journal.pone.0013060
   PubMed Web of Science ®Google Scholar
• Wikelski, M., & Bäurle, S. (1996). Pre-copulatory ejaculation solves time constraints during copulations in marine iguanas. Proceedings of the Royal Society of London. Series B: Biological Sciences, 263(1369), 439–444. https://doi.org/10.1098/rspb.1996.0066
   Web of Science ®Google Scholar
• Wilcox, S., Dusza, K., & Houpt, K. (1991). The relationship between recumbent rest and masturbation in stallions. Journal of Equine Veterinary Science, 11(1), 23–26. https://doi.org/10.1016/S0737-0806(06)81242-6
   Web of Science ®Google Scholar
• Wildt, L. (1998). Sperm transport in the human female genital tract and its modulation by oxytocin as assessed by hysterosalpingoscintigraphy, hysterotonography, electrohysterography and Doppler sonography. Human Reproduction Update, 4(5), 655–666. https://doi.org/10.1093/humupd/4.5.655
   PubMed Web of Science ®Google Scholar
• Wilmes, A. J., Siegel, D. S., & Aldridge, R. D. (2011). Premature sperm ejaculation in captive African brown house snake Lamprophis fuliginosus. African Journal of Herpetology, 60(2), 177–180. https://doi.org/10.1080/21564574.2011.608384
   Web of Science ®Google Scholar
• Waterman, J. M. (2010). The adaptive function of masturbation in a promiscuous African ground squirrel. Plos ONE, 5(9), e13060. https://doi.org/10.1371/journal.pone.0013060
   PubMed Web of Science ®Google Scholar
• Yamada, G., Satoh, Y., Baskin, L. S., & Cunha, G. R. (2003). Cellular and molecular mechanisms of development of the external genitalia. Differentiation, 71(8), 445–460. https://doi.org/10.1046/j.1432-0436.2003.7108001.x
   PubMed Web of Science ®Google Scholar
• Yasin, B., Pang, M., Wagar, E. A., & Lehrer, R. I. (2002). Examination of chlamydia trachomatis infection in environments mimicking normal and abnormal vaginal pH. Sexually Transmitted Diseases, 29(9), 514–519. https://doi.org/10.1097/00007435-200209000-00004
   PubMed Web of Science ®Google Scholar
• Zainal Zahari, Z., Rosnina, Y., Wahid, H., Yap, K. C., & Jainudeen, M. R. (2005). Reproductive behaviour of captive Sumatran rhinoceros (Dicerorhinus sumatrensis). Animal Reproduction Science, 85(3–4), 327–335. https://doi.org/10.1016/j.anireprosci.2004.04.041
   PubMed Web of Science ®Google Scholar
• Zimmerman, S. J., Maude, M. B., & Moldawer, M. (1965). Frequent ejaculation and total sperm count, motility, and form in humans. Fertility and Sterility, 16(3), 342–345. https://doi.org/10.1016/S0015-0282(16)35587-X
   PubMed Web of Science ®Google Scholar