While argumentum ad alligator is no doubt a difficult argument to answer, I will note there is plenty of documentation of "homosexual" behavior among animals (see http://en.wikipedia.org/wiki/Homosex...ior_in_animals). You'll see there that scientists have even found evidence of a genetic basis for this behavior among mice and other animals. Or, if you want something better than Wikipedia, see the article "Same-sex behavior seen in nearly all animals," http://phys.org/news164376975.html ....and logic supports the thousands of years old position that same sex preference is culturally influenced. Supporting my position is that male lions prefer female lions, male elephants prefer female elephants, male cheetahs prefer female cheetahs, male alligators prefer female alligators (e.g. putting two male alligators in unnaturally close proximity with one another is likely to result in the death of one of the male alligators), etc.
Yes--and that men like men (see Plato's Symposium) and that women like woman (see the poems of Sappho), whether religious and political leaders like it or not. As Foucault shows in The History of Sexuality, the heterosexual norm is culturally constructed; for most of Western history, sexual identity and preference was pretty widely considered fluid, not fixed. And it's not just in Greece or the West that homosexuality and other variations of sexuality and gender have been well-known, and sometimes honored--see http://en.wikipedia.org/wiki/History_of_homosexuality .For thousands of years, humankind lived with the position that men like women;