The fact that mostly men listen to the type of music I listen to does not make me masculine or a man. Neither does the way I dress. The way I smell, look (without clothes on especially), talk, etc. are what makes me masculine. That and the fact that I am actually a man. What kind of job I work at and/or my interests do not define my gender. What kind of job I do does effect my role in society though. Gender role wise, women aren't usually Gladiators in ancient Rome for example. That doesn't mean that they couldn't have been, just that it didn't happen. You can dress a guy up in a dress and makeup, and he will still have to change his voice and almost everything else about him to truly appear like society's construct of a female. Clothes don't really make the man.
Women do have certain things that make them naturally more capable as mothers. That is just the way it is, though some men try really hard.
You think that your clothes, interests, etc. define your gender?