Oh, for sure. I don’t imagine bears have the same cultural understanding of sex, however complex that may be, that people do.

bear in the woods isn’t thinking “Since I am a heterosexual bear, I am not going to rub my penis on that other bears ass because I see it’s a boy bear and that would be gay. […]”

I do think this might be overly simplistic, though. The tendency for a bear to “be gay” by our standards might manifest differently, but it would still be an observable behavior, no?