Most of us grew up with our masculinity being called into question, and usually in a rather harsh and possibly violent manner. And most of us eventually stopped spending time with such people, and the ones we did hang out with didn't mention our femininity - partially because they didn't care, and partially because they (perhaps instinctively) knew that it was a sore spot growing up, and perhaps it wasn't a good idea to dwell on that topic.
So as time went on, and people stopped mentioning our feminine ways, we grew to believe they didn't exist. Hey, nobody said anything, so they're not there, right? It's certainly easier on our still-fragile ego to think that we're 100% straight acting than it is to think that the thing we got bullied for as a kid is still visible for the world to see.
Part of my job involves playing back recordings of my voice, and watching video footage of myself. Doing this on a regular basis, it's hard to maintain the illusion in my mind's eye that I'm 100% straight-acting. Right there - that eye movement, that hand motion, the way I said that word - all effeminate. And each time I see and hear it, I fight those bullies again. Not by butching it up, but by having to convince myself yet again that yes, I'm somewhat effeminate, and there's nothing wrong with that.
Lex