In a bar in a remote Alaskan town, a newcomer hears people yell out numbers (#23!, #56, etc.) and then everyone laughs.
He asks the guy next to him what's going on, and he says the jokes have been told so many times, people just yell out their numbers instead of retelling them.
So he yells out #27! but nobody laughs.
The guy next to him says, "Some people can tell a joke, and some people can't.