well i know for sure that something triggers male pattern baldness..
I have two friends (idential twins) who i grew up with.. one lived up north with his mother and the other lived here in Florida with his father..
Twin A, comes to visit florida ever so often.. That twin has noticabley less hair than the Twin that lives here in Florida.. dunno why.. but there must be something...
both drink, neither smoke..
these twins are now 28 and they both live around here.