Two men are in a mental institution. The nurse walks up to one of them, who is moving his hands back n forth through the air, and says "Charlie, what are u doing?"

He says " Shut up bitch, I'm driven to Chicago."

So she leaves him alone and comes back the next day and says "Charlie, have you made it to Chicago yet?"

He says "Shut up bitch, I'm just pulling in now."

So the nurse goes into the other room where she sees one of the other patients jacking off real hard and she says "Bob, what are doing?"

He says "Oh, I'm just fucking Charlie's wife while he's in Chicago."