The fluff on the face is dense, which is related to the secretion of male hormones. If you don't shave, it will grow very slowly. You often shave and grow fast. If you don't have too much fluff on your face, you don't have to worry, and it won't be long.

In life, have you found that some women also have obvious villi on their lips, because they secrete more androgen than estrogen?

Both men and women have androgens and estrogens in their bodies. If a man secretes more hormones, his masculinity will be obvious, such as having a beard.