Here's the fun thing about hair...I've got it backwards compared to my two younger brothers. I have four brothers, two older, two younger. The two younger ones are 19 and just turned 22. The 19 year old started growing facial hair when he was 15 or so and can almost grow a full beard. The 22 year old...well, he shaved a lot in his teens so I can't pin point exactly when his facial hair started coming in but he has a full face of stubble after a day. Neither of them have much body hair besides a stray nipple hair while my stomach, back, chest, and shoulders are covered in hair. I'm about as fuzzy from the neck down as my brother in his 30s (36?). That's the kinda weird part. My body hair is growing in pretty darn strong but places where it's visible (ex: face, hands, forearms) doesn't have much of anything that's visible.
