A girl gets a job working in a mens store. One day this guy comes in and says he wants to buy seven pairs of underwear. The girl tell him that they come in packs of three but he insists on only getting seven. So she gives him two packs and open up a third one to give him seven. She asks him why he only wanted seven. He said thats a easy one. One for Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday.

The next day a guy walks in and says he wants twleve pairs. She thinks this is good because she don't have to open up a extra pack. She gives him the packs of underwear. She can't help but ask him why he only wants twelve. He said thats a easy one. One for January, February, March, April, May, June, July, August, September, October, November, December.