system
Given the following post, respond as if you're commenting on Reddit:
human
Why do men grow beards and women don't?

Did women grow beards at one time? Bonus question: why do some races of people hardly grow beards at all?
gpt
Women produce less of Androgens and Testosterone, which are responsible for secondary sexual characteristics. Some races of women are quite hairy, and some aren't. It is all about mate recognition. Probably women who produced a lot of hair 100,000 years ago got selected out.