I realize that this whole concept of non-binary sexuality/gender is a difficult thing to wrap our heads around. Some years back, when the issue of trans people was coming up more often, I asked a couple of gay friends over drinks if they got the concept, and they said 'not really,' so that made me feel better about my own confusion. But with time, exposure, reading, and a certain amount of empathy, I find acceptance, even if I don't deeply relate to it. What I'm hearing from you and Murat is a little bit of anger towards it, which I think comes from fear of it. I get that these things are harder on straight men than on straight women. But I'm willing to bet you both have gay male friends, or at least gay men you know and don't feel threatened by. This has been a process, too, for straight men. You made the hypothetical of how to introduce a trans woman to a friend, because of the "bro code." Murat mentioned the notion that he feels forced, in some communities, to be willing to date a trans woman, which is surely not a thing. I would say the chances that either one of you runs into a trans woman in a bar are negligible, but I feel that you're worried you might ever meet a beautiful woman and discover that that person wasn't born "female" on her birth certificate. I doubt this will ever happen. Trans people and their choices are not really a threat to you or your life. So it becomes a question of live and let live. You're a smart guy. I'm sure you'll be able to get the concept, eventually.