Re: im wondering
There is an average...there's an average for any number set. But we don't know what that is, because all we have are Internet surveys. Adults lie on Internet surveys (Internet surveys usually come up with >6" for an average; real studies come up with usually 5.5" or even less). I can imagine that teenagers lie even more, and the less-developed are less likely to participate.
Obviously, there's been no study (where a nurse measures your erection) for under-18 people because that would attract the wrong kind of publicity.
The short answer is, we have no idea what the average is.
"I don't believe in magic. But I do believe in interpreting coincidence exactly the way you want to." -Sherman Alexie