throwaway1821

At least one axis here, alongside the gay-straight axis, is dominance behavior. One can feel dismissal or dislike towards people whose behavior registers as submissive. There are varying degrees to which gay men manifest this -- and considering whether your anti-homo feelings correlate with it can be informative -- but many definitely do.

In many of the papers on sexual arousal and orientation, the sensation assessed is genital arousal. In men this is erection. I wonder if this punch in the gut feeling is linked to it somehow, or independent?

In those studies -- many by Meredith Chivers -- there is a clear differentiation in men (though not in women) in arousal that distinguishes heterosexual and homosexual patterns of attraction.