This definitely rings a bell - before I realised I might be trans I never paid much attention at all to men - now I find myself actually noticing them, lol! The other day, rather disturbingly, I found myself actually resenting a male friend at work - he's so effortlessly 'male' - so confident in the way he wears his physicality. Grr. The poor man. Ain't his fault. And he probably has his insecurities like everyone else, lol.