Why don't women grow beards?

The reason why women don't have beards is:

Androgen can promote the full growth of beard and body hair, but inhibit hair growth; Female hormones can promote hair growth, but inhibit beard growth. That's why girls don't have beards.

Joke story:

Wife: "hey, I heard that men are bald because they use too much brain." Is that so? "

Husband: "Yes! Women don't have beards just because they talk all day and their chins move too much. "