When it comes to sex, Darwin didn't go far enough. Whereas his theory of natural selection dictates that species adapt the most efficient and logical traits, Generous Man makes the case that an animal's success, sexually, depends on developing the least efficient traits. N rretranders uses as the central symbol of his theory the peacock's plumage. It's cumbersome, showy, and inefficient -- and therefore terribly attractive to peahens. Put more simply,...