One simple thing I'm wondering about, basically, in my age group (18-25), I'm all the time seeing all sorts of different types of guys, guys who range from the most feminine looking to the most masculine. One thing I seem to notice a lot is that young mens' beard hair type seems to vary a lot - some young men my age have very cotton-y, soft, baby-fuzz beards, while others, like me, have hair strands thick, pokey, and strong enough that it could literally damage your corneas if you were to put your eyeball on my chin. It's like being a porcupine. Does the thickness/strength/pokey-ness of the hair on one's face relate to high amounts of testosterone? It would certainly match the pattern I see where only the "squared jawed" or "older" men have the pokey beards, while the softer looking men seem to have the baby fuzz or softly wooly/curly beards (or even no facial hair growth at all.)