Yeah, I have a friend who all of our mutual friends love to talk about how big he is. They tend to exagerate it up to like a foot, but the funny thing is that he isn't as big as me when we have seen each other in the shower. He still gets loads of action off of it though. I feel a bit cheated, but I really don't want to be talked about like he is anyways.
Its funny though, even though I don't think anyone believes he has a 12 inch dick, most of the girls seem to be won over by their curiosity. I think they must be sorely disapointed, he says he is about 7 inches in reality.
So in agreement with the post above, the key is to somehow get your friends to start talking and joking about how hung you are, then your set.