Mostly the effects of higher Testosterone levels, and low Estrogen levels, which you can find on many medical websites. Basically, worse communication and language skills, better mathematical skills, (and, just for clarification, I'm a girl- I don't mean to be sexist, it's just a real biological thing), generally being a more logical/thinking person, as opposed to an emotional/feeling person. Masculinity is also usually associated with dominance and power, and masculine people usually express this through a more powerful voice, expressing anger more vividly, and (as expressed through body language) often taking a wider stance rather than being closed (pretty much- knees apart, feet flat on the ground or legs spread out, arms also spread out, not usually crossing their arms and legs or pointing their feet inward). Extremely masculine people feel the need to be the best at everything, so often engage in competition and become very emotionally involved in it. They also usually hate theoretical thinking, and spend more time in the moment.
