Actually many of them do.
Name one male animal which inserts its organ into the anus of another male.
That's what I thought.
Don't make ridiculous and indefensible comments.
Actually many of them do.
Proof? Excluding animals in captivity (zoos, domesticated pets and livestock).
Verified observation of continuing patterns of homosexual copulation in wild species in natural habitat - not misinterpreted displays of dominance. Never seen it and the gay lobby would be trumpeting it if existed.
Actually many of them don't. Most of the observed "homosexual" behavior of animals is either when they are incarcerated in an unnatural manner in jails or cages, or purely as a dominance display.