The issue of self-identify is interesting, maybe I'm repeating myself, but in a sense we all do it. We don't ask to see somebody's genitals, before they use the loo or a changing room. So we trust people's self-identification. I'm not sure how much trans people make us feel off balance, because there might be a woman with a penis. But it's odd how trans men seem to excite less opposition, of course, some of them pass very well, as testosterone builds up muscle, deepens the voice, and so on. I remember that Judith Butler said that all gender is drag, which is quite funny.