Why Is Sex Fun? The Evolution of Human Sexuality

Published in 1997 by Basic Books as part of the Science Masters series, this book by the biologist Jared Diamond examines human sexuality from an evolutionary perspective. Its approach starts from questions that may seem trivial at first glance but, in the author's view, reveal a great deal about our species.

Diamond addresses aspects such as why women's ovulation is not overtly advertised, unusual among mammals; why humans have sex in private rather than in public, as other mammals do; and why the ovaries are U-shaped. From these questions, the book offers evolutionary explanations for human sexual behaviour and anatomy.