>20 years ago, I would bet money that lots (not all, but lots) of white men would be aghast if they found out a woman they’re dating that they thought was white was actually mixed race.
Now I imagine the amount of men who’d feel this way is much, much lower. Why? Because of changes in social stigma – the stigma of a white person dating a black person is much, much lower than it was in the past. That kind of social stigma is responsible (in my understanding) for most, if not all, of the kind of revulsion that folks feel in terms of romantic relationships and sex.
Social stigma for dating a trans person is still pretty significant, especially for (cis) men (I’ve noticed that the “eww, gross!” responses are much, much more common from men then women with regards to dating a trans person), and thus plenty of cismen still claim feelings of revulsion at the thought of dating a transwoman.
I’ve noticed this personally in myself – 20 years ago, I would have said “eww gross”, both at the thought of dating a transwoman and even at seeing gay or trans (but not lesbian!) kissing in a movie. No longer. I’m not single, but I’m straight, and if I found a transwoman attractive (like, say, Janet Mock) I’d have no compunction in dating them (were I single). And when there’s a gay or trans kissing scene on TV, it’s no longer revolting to me at all.
So I think the vast majority of this dating thing is just about social stigma. No shame in admitting it – pretty much everyone is affected by this kind of thing in society and culture. If you find the idea of dating a trans person gross, okay… but I’d recommend at least considering the likelihood that this is at least partially because of social stigma, and not because there’s something inborn inside of you that screams “oh gross!” at the thought of dating a trans person.
As another piece of evidence, consider all the cultural and societal rage in the past against homosexuality. This was mostly focused on gay men, in my understanding – gay women certainly experienced difficulties, but if I have my facts right, gay men were more likely to be beaten or killed for being gay. The social stigma was stronger against gay men than gay women, I think. And thus straight men were far more revolted by the idea of dating a man than straight women were about gay women. Again, in my understanding of the facts. If I’m right about this, then I think it’s pretty clear those two things (stronger societal stigma against gay men, and stronger revulsion by straight men to gay men) are strongly linked.