Let's get one thing straight here, no pun intended. Homosexuality is about being attracted to and engaging in intimate acts with members of THE SAME SEX. It has nothing to do with your butt hole or what goes in and out of it.
Having a girl stick fingers up your ass is not remotely a homosexual act. Now I'm not saying dudes should regularly take it up the dirt but is a girl's ass and a guy's ass really that different? I'm no doctor, nor did I stay at a Holiday Inn Express, but I suspect probably not. We seem to champion women who ram things in their butts, maybe they're on to something.
Homosexually has nothing to do with what you do with ANY part of your body, it has to do with WHO you do it with. Gay guys suck each other's dicks all the time, does getting a blow job make you gay? Depends on who's blowing you doesn't it? Guy blowing you = Gay, girl blowing = not. Same principle applies to ANYTHING two people do with each other.
And if a girl has the adventurous spirit enough to even mention that she'd like to try putting things in your ass then HELL YES she's going to be one fucking fun woman to be around. Her kink does NOT end there, I assure you. If you've got an open mind she will make your life fun as hell, if not then go find some frigid librarian. I'm sure she'll never offend you.