Hi Kelly-
I get what you're saying, lots of times guys will "macho-up" in an argument, lord knows I've done it plenty of times, and being in a skirt makes it tough to do that. It seems to be that people should be able to have a disagreement and argue without gender being part of it. Hell, relationships are hard enough without transgenderism being thrown in on top of it.
As far as the sports and the "quien es mas macho" stuff, a lot of times, at least I think so (go ahead, flame me, I have my asbestos panties on, they're itchy but they work) it's a cover for our feminine feelings. We learn to disguise ourselves around other men and so get into sports or macho occupations and so on. Not to say that women can't be seriously into sports or in those sorts of occupations, too.
Anyway, you are so right, it's mind boggling how many avenues this aspect of human behavior can take you. Books have been written.<lol> Give him his chance to work through it, which it so sounds like you are. It's even worse in some ways to be given freedom to be yourself if you've been closeted up for years and learning how to deal with that freedom is kind of tough.
Hugs...Joni Mari