What's love got to do with it?

Romantic love very often has little to do with our sexual drives. Current research indicates that more powerful and urgent is the biological imperative of passing on genes, and the adaptive behaviors that have evolved over time. What is particularly surprising are the new alternative interpretations of traditional science that imply an increased role on the part of human females in initiating sex, biologically encouraging or discouraging pregnancy, and more. Because so much of human sexuality until recently was studied and interpreted by men, the possibility of alternative interpretations of human sexual behavior is creating front-page news. Some scientists now see menstruation not as a "curse," but as a protection against bacteria that can ride in on the backs of sperm, and additional new evidence shows that sperm can be manipulated by the female as well as the male in a silent war over who conceives with whom. These are just some of the new hypotheses explored in What's Love Got to Do with It? that are forcing scientists to rethink the human sexual arena.