instruction: Why don't women have beards?
response: Facial hair is typical in our ancestors, but now it's absent in most women. The difference seems down to evolution. Humans have become less hairy in the millions of years we developed from apes. Over time, men came to prefer women with little or no facial hair. Those women will pass this "hairless" gene to their daughters. Then those girls would have a head start in the ancient dating game.