I have shared a bed with a gay man - I could have had a little try and no one would have known - but it just didn't appeal to me in the slightest. The bottom line for me is to go with what feels natural to you. For me it's women, for you it may be just men and for you, both - what's the issue?
I would let a woman shag me up the arse with a strap on if she wanted - so what? I would not say that that was being gay - just having anal - the same with rimming or prostate massage - sexual acts do not define orientation and they are not exclusive to one orientation.
I am sexually attracted to the feminine sex, that is what labels me if you insist, the fact that I like a lot of the "gay" men here has no bearing on my sexual tastes - what I "do" with a woman or allow her to "do" to me, does not redefine me.
Is it me?