Someone on another thread guesses that penis size is hereditary, but does anyone know? And if so, it doesn't follow that you get it from your father. Very little is actually carried on the Y chromosome (the start of the process for being male, some kinds of Muscular Dystrophy [I think it was] and hairy ears - there are also some funny lists, like "ability to fold maps" and "affinity for the remote") or even on the sex chromosomes at all. So you'd get half of it from your mother, strange to tell, but you'd only be able to find out about that from your maternal grandfather or uncles. So does anyone have any verified information about the heredity of penis size?