Hmmm...
I guess it depends on what you mean by "change." I certainly believe that people can be so socialized with disgust at the idea of same-sex relationships that they are able to play up whatever attraction they have to the opposite sex (for the ones through fives on the Kinsey scale) and play down whatever intrinsic attraction they may have to the same sex. I think that this is part of why the apparent number of gays/ lesbians fluctuates through history -- higher when it is more accepted, lower when it is more dangerous. It never disappears because there will always be the sixes, those who are just absolutely not attracted to the opposite sex and very attracted to the same sex.
I get your point about people looking for reasons to explain their disgust, olo, but it's a bit of a vicious circle. For whatever reason -- in-the-closet, self-hating folks or just people who actually believe it for no particular reason -- there is and has long been a lot of hatred expressed towards gays and lesbians, often with the justification of religion. So I think that atmosphere is part of what
contributes to the disgust.
My 3.5 yr-old daughter is a fashion fiend and is already really into the idea of wedding dresses, and weddings. (It's in that order, though -- a wedding is pretty much just an occasion to wear a wedding dress.) So she is always talking about how she is going to marry her friend Jack and what they will wear.
I thought it was cute and all, and then I was like, wait... how come she never talks about marrying her friend Claire? How has she already internalized that girls marry boys/ women marry men?
So I started being a little more aware of that. For example, I usually read the paper with her in the morning; there was a picture of a gay couple embracing and when she asked (she always asks "what's that?" or "who are they?"), I said those were two men who loved each other and were getting married. I said it like it wasn't a big deal, she didn't miss a beat.
Anyway, my point is that this is self-perpetuating, and the cycle needs to be broken at some point -- which I think we are making progress towards. It is only "disgusting" if that is how you are socialized -- heterosexual sex can be pretty disgusting, too, if you overthink it. So in your example, olo, if people were not so disgusted by the fact that they are attracted to the same sex, they wouldn't then look to the bible for justification of that disgust, and of course that disgust contributes to the socialization of future gay or bi people... etc.
My point was clearer when I started this, I've been interrupted 18,000 times. Hope something came through.