The trans aspect is a bit of a red herring here, surely?
The actual issue has got to be that sex should only actually happen given informed, enthusiastic consent of all parties involved - and it's the 'informed' bit that's sorely lacking here.
Yes, granted, that has implications for trans people in that it basically implies they've got to disclose what their partner is to expect in terms of genitals. It's got implications for the rest of us, too:
If, hypothetically speaking, I just really get off on giving a bit of tooth, I genuinely believe that my male partner is entitled to know that this is what I have in mind before I sink my biters into his penis. And if he happens to not be into that I don't get to bite him. Somewhat understandably, most people (regardless of sex) are just not that into stuff that hurts them.
That's not particularly revolutionary, surely? It's part and parcel of people having a right to say what does and doesn't go where their own bodies are concerned. The most basic tenet of self-determination. It's not transphobic. It's not anti-biter or bigoted against folks that really enjoy anal or whatever. It's not saying that you generally don't get to penetrate women with vegetables or give chili pepper blow jobs or participate in group sex. It just means you're going to actually have to have to make the effort to find partners that are interested in the same thing and - preferably, I suppose - you happen to also find attractive.
Surely that's just called 'not being a sexual predator'?