So what you are saying is, if you were deserted on an island with another man, or if all the women on earth disappeared, you would have gay sex for lack of anything better, and failing that, you would grab an animal. Because this is what's in your mind, you assume it is in the mind's of homosexuals as well.
“Nothing optional--from homosexuality to adultery--is ever made punishable unless those who do the prohibiting (and exact the fierce punishments) have a repressed desire to participate." ― Christopher Hitchens