Interestingly, it’s not about the look of genitalia specifically.

For example, I happen to be a hetero person, yet I appreciate both genitals equally. What matters is how feminine the carrier is. I’ll appreciate a nice dick on a beautiful woman, but on a man…ew. Same with vaginas - if it belongs to a woman, it can be very arousing, but you won’t find trans men in my bedroom.

It’s the same genitals, but their perception is wildly different.