I guess we all have concepts confused...isn't gay male-male relationship? I guess if we stick to the technical fact, having a girl messing with your brown eye doesn't make you gay...however, if you fantasize with a real cawk while your girl is fingering you, then YOU ARE gay. The same if you enjoy it and ask for more and bigger in your ass, that's something weird...but if you do the sacrifice to feed your girl's freak fantasy, i guess there's nothing wrong. Your ass is just another hole. As long as you don't tear your ass apart with a baseball bat, everything is fine.
I don't see the attraction to have it done though...