You previously said it's transphobic "If you're attracted to someone and then pretend you aren't simply based on the fact that they're trans" and I don't quite agree.
Say, for example, that I, a straight man, am attracted to a woman. After a while I discover that she's gay. I'm attracted to her, but I may pretend not to be given the situation. That doesn't make me homophobic, I'm just making a decision based on information.
Edit: just to be clear, I'm happy to have a discussion, but if what I'm saying is causing offense or upsetting you, I'll stop. I just want it to be clear that I have no intention of "winning" the conversation. :-)