You are quite correct, it is a stereotypically female reaction and won't be tolerated among men. I wouldn't come within ten yards of a man that was known to do it, nor would I trust him in any way, nor would any of the men I know. We are normally conditioned against it at a fairly early age; if ostracism and ridicule aren't enough to convince a kid, he'll learn that crying in front of a pack of angry teenage boys bears consequences, and crying in front of one's father could be an extraordinarily painful mistake.
I don't know much about how to help it, though, if you haven't had that sort of conditioning. I've known many transmen to say that it goes away during HRT, and self-control generally increases with age and experience regardless.
One possibility: when I was a teenager, if I thought I'd lose control of my emotions, I generally caused myself some level of physical pain. It seemed to help.
- N