Given the time most men spend with their penises, you'd think they were experts on their little friends...but we wouldn't be so sure. Same to you cocksure ladies out there that think you know all of your penis facts. You may be believing the penis myths as much as the next girl. Well, if you really want to see if you are a penis expert, take the penis quiz and we'll really see who the big swingin' dick experts really are.