20 years old and still no beard?

We'll see!: How think your beard grows is a function of your genetics. Hollywood super-masculine star paul newman couldn't grow a beard. In the usa, many women prefer a man with a very thin beard & a naturally hairless chest. Enjoy who you are. This would be a great time to add on some more smooth muscle onto your body -- you're at your physical peak. Good luck.

Nor unusual: Some young male take longer to develop a beard and some never are able to grow a full beard.