But you could have 100 men in identical gray suits and no one would even notice. Similarly, men don't wear makeup, but women do. Make-up is just like adding 'ette' or 'ed' to a verb to create a special meaning. My cousing has ankle bracelets, a ring in her belly button, another in her eyebrow, and a stud in her tongue. She is distinguishing herself from the pack.
Hairstyle is the same way.
There are far more styles available for women than for men. Very small nuances in how clothes are worn communicate volumes in women, but not in men. Even forms of address are very telling. Tannen notes how people react to women using the title doctor. Female congress men , doctors, professors and other important people are often confused with staff.