I was gonna say... according to my genetics class in school, they've found that set of genes (for it's actually 4 or 5, if I remember correctly) and it IS on the X chromosome, not the Y. My dad's mother has baldness in her family, as well as the mother of my paternal grandfather, so all the males on that side have typical male-pattern baldness on the crowns of their heads. My maternal grandfather and grandmother both have very thick, healthy hair, and even though I am only 20 (soon to be 21, btw), I still have more hair at my age than any of my father's side of the family did.
I guess I'm lucky; but sometimes having so much thick hair is a curse, since haircuts are a chore and a half, nothing ever works for me
Back to the subject at hand...
My father is pretty well hung, and kind of jokes about it with me ("Your mom didn't like me for my looks, but she sure liked my cock") and stuff like that, but I came out pretty average. My uncle on my mom's side is gigantic, and my stepdad is also pretty big, as is my half-brother.
I got the short end of the stick, I 'spose. It's kinda crappy, having a 14yo brother who hangs as big soft as I do hard, LOL. (not that I'm looking in THAT way, just random glances and shit).
...Eww, I just grossed myself out.