Bruce Bagemihl writes that Biological Exuberance: Animal Homosexuality and Natural Diversity was a "labor of love." And indeed it must have been, since most scientists have thus far studiously avoided the topic of widespread homosexual behavior in the animal kingdom--sometimes in the face of undeniable evidence. Bagemihl begins with an overview of same-sex activity in animals, carefully defining courtship patterns, affectionate behaviors, sexual techniques, mating and pair-bonding, and same-sex parenting. He firmly dispels the prevailing notion that homosexuality is uniquely human and only occurs in "unnatural" circumstances. As far as the nature-versus-nurture argument--it's obviously both, he concludes. An overview of biologists' discomfort with their own observations of animal homosexuality over 200 years would be truly hilarious if it didn't reflect a tendency of humans (and only humans) to respond with aggression and hostility to same-sex behavior in our own species. In fact, Bagemihl reports, scientists have sometimes been afraid to report their observations for fear of recrimination from a hidebound (and homophobic) academia. Scientists' use of anthropomorphizing vocabulary such as insulting, unfortunate, and inappropriate to describe same-sex matings shows a decided lack of objectivity on the part of naturalists.