Had a friend (HE) in Grade school who swore that his dad won more bets claiming to have a 12" penis when erect. Many takers and many losers. Now he could have lied; but I also heard from some who's dads had bet HE's dad and lost... I think they were tellin' the truth. Why would they want their dads to look stupid or bad...
I haven't checked mine lately - I'm still waiting for the oral stimulus so I can register my best length (from the article).
From what I remember, the "talk" was that he'd bet guys (mano y mano) and then pull it out beside a ruler to prove it was as long as he claimed. Being a kid I never saw this happen but heard many talking about it. Yes it's hearsay, but from what many kids told me and others, there sure were a lot of dads who lost bets.