To respect member's privacy and keep things awesome, most of Litsy is hidden from Google. We let humans see and share pages, but not machines. Find out more.
From the best-selling author of Survival of the Sickest comes this presentation of strange and fascinating discoveries about the human mating game, from the structure and function of human sex organs to the peculiar biology of sexual attraction, in an account that also examines contraception, pregnancy, sexuality, and sterility. 100,000 first printing. Original.