Love That Dare Not Squeak Its Name

Scientists have found homosexual behavior throughout the animal world.

This growing body of science has been increasingly drawn into charged debates about homosexuality in American society, on subjects from gay marriage to sodomy laws, despite reluctance from experts in the field to extrapolate from animals to humans. Gay groups argue that if homosexual behavior occurs in animals, it is natural, and therefore the rights of homosexuals should be protected. On the other hand, some conservative religious groups have condemned the same practices in the past, calling them "animalistic."

But if homosexuality occurs among animals, does that necessarily mean that it is natural for humans, too? And that raises a familiar question: if homosexuality is not a choice, but a result of natural forces that cannot be controlled, can it be immoral?

The open discussion of homosexual behavior in animals is relatively new. "There has been a certain cultural shyness about admitting it," said Frans de Waal, whose 1997 book, "Bonobo: The Forgotten Ape" (University of California Press), unleashed a torrent of discussion about animal sexuality. Bonobos, apes closely related to humans, are wildly energetic sexually. Studies show that whether observed in the wild or in captivity, nearly all are bisexual, and nearly half their sexual interactions are with the same sex. Female bonobos have been observed to engage in homosexual activity almost hourly.