The inmates of a prison had a joke book they all had memorized. The way they recited jokes was by the number of the joke. Some fellow would call out a number from one to one hundred and all would laugh.
A new man in the prison, after studying the book, said he wanted to tell a joke. They said, “Okay, shoot!”
He said, “Number ten,” but nobody laughed. He said, “This is funny. What’s wrong; why aren’t you laughing?”
A fellow nearby said, “Some can tell them and some can’t.”