How much do you really know about sex? In Sex: A Natural History, Joann Ellison Rodgers unearths both the roots of our sexual nature and the expression of our primal urges, explaining what it is that makes us male and female, and providing fascinating insights into the biology and physiology of flirtation, love, courtship, intercourse, fidelity, parenting, and nurturing. She describes scientists' discoveries about how the hormone that triggers labor contractions keeps prairie voles faithful to one mate, how the brain waves of female mice change when a male comes within smell range, and how Harlequin paperback romances and fantasies can be arousing-and what these findings tell us about our own sexuality. Sex: A Natural History illuminates one of the most powerful, and often misunderstood, aspects of human and animal existence.