ABSTRACT
An evolutionary, interspecies perspective for our hominid sexuality has been presented in Chapter 3. This perspective establishes the roots for our biobehavioral sexuality as modern humans by connecting us as a species to our primate heritage through time and space. This connection has been illustrated in discussions of the shift from estrus to amenstrual cycle, and the role of such intra-and inter-species behaviors as bonding and orgasm. Modern adult sexual and reproductive anatomy and physiology, which emphasize hormones, are introduced in this chapter and discussed in more depth in Chapters 5 and 6. This discussion of hormones also serves as an introduction to exploring male and female anatomy. Normative physiology and anatomy are assumed unless specifically stated otherwise.
