God there's a lot of Neanderthal drivel on this thread. Homosexuality means, literally, same sexuality. If you're a bloke, and you fancy a bloke, it's an instance of homosexuality whether you're shoving the handle of a bullwhip down his jap's eye, having a pint together or attending the christening of his first child. (Let's agree not to get into a debate about bisexuality here - that'll just muddy the waters.)
What a man does to a woman, or vice versa, in the heat of a sexual encounter by definition cannot be homosexual, latent or otherwise, because part of the pleasure is always down to the person you're fucking, including their gender.
Personally I love arse play with the women I fuck, and I know I'm 100% hetero. Gay friends have tried it on with me in the past and it has done absolutely nothing for me. UKP can choose to disbelieve me but that would be rather childish, no?
Men give other men blowjobs too. Does that mean that every time I cum in a woman's mouth I'm, you know, a bit limp-wristed? Sexuality is a function of who you're with, not what you're doing.
Can we step away from the 1950s please?