So a man walks in to a CVS.. and he goes to the female cashier and asks how he can know what size condom he should wear. She tells him to step behind the counter, she unzips his pants, gives him a few tugs and says ""Medium"". He buys his condoms and tells his buddy ""Hey, there's this girl at the CVS who can guess your condom size just by looking!"". His buddy, being a 'skeptic' goes and checks it out. She follows the same routine and says ""large"". He calls his friend when he gets home and is ecstatic. His 14 year old brother overheard the conversation and decided to 'try it out' for himself. So he goes to the CVS and asks the cashier what size condom he is, she asks him behind the counter, gives him a few tugs and says ""Clean up on register 5!"". **tl;dr - handjobs.**