When I consider with whom I'd want a marital relationship or intimate sexual relations, it's going to be with another cisgender gay man. If someone is going to be my spouse or engage in sexual activity with me -- I need to connect, physically and emotionally, with him based on the common experiences we've had from childhood. I don't do casual hookups. I'm a "side," so I don't engage in ANY anal penetrative sex. So, for me, part of this element of attraction would indeed be based on our anatomical similarity -- but another part of it is due to our common experiences coming-of-age as cisgender gay men. I similarly have doubts that I would be romantically compatible with a cisgender bisexual man or a cisgender straight man (the latter is like, "Obviously!").

Now, I'd have no problem if a transgender man saw me changing clothes or taking a shower. I'd have no problem with a transgender woman seeing me in such a vulnerable position, either. In general, it's cisgender women in front of whom I *wouldn't* want to be naked or partially-undressed...unless she is a medical professional in an emergency situation.