Supposedly, the proven method for telling if you have a thick dick is to get yourself fully hard, then try to stick your dick in a toilet paper roll. If it slides through with little or no resistance, not to worry, you're in the normal range. If it goes in halfway but gets stuck or won't even go in at all, then congratulations. You, Sir, are the proud owner of a fat cock. After Davey and Travis have some fun shoving each other's rods through a toilet paper roll, they find themselves left with fully aroused dicks and nothing to do.