I always shave it cause it grows super thin I'm just late in puberty I think I'm just starting to grow chest hairs. If I don't get my full beard by next year I'm looking into testosterone replacement.
It's primarily genetics breh.
Sure, some guys have more testosterone than others but the deciding factor is how your body reacts to it.
Some are very sensitive (quick, dense facial hair coverage) and others aren't affected much at all (slow, sparse to no growth)



pics?