Abstract
Humans are sexual creatures. Human preoccupation with sex and sexuality makes sense from an evolutionary perspective. In particular, Evolutionary Psychology (EP) has proven to be a valuable heuristic approach for generating and testing hypotheses about human sexuality. The main theme of this volume is the evolution of human sexuality, or evolved human sexual psychologies. A second theme is the identification of implicit conceptual assumptions about sexual attraction and the operational definition of key terms in order to promote greater integrity of conceptual models.