Bartender: "Sure... go ahead."
Man: "What covers a house?"
Dog: "Roof!"
Man: "How does sandpaper feel?"
Dog: "Rough!"
Man: "Who was the greatest baseball player of all time?"
Dog: "Ruth!"
Man: "Pay up. I told you he could talk."
The bartender, annoyed at this point, throws both of them out the door. Sitting on the sidewalk, the dog looks at the guy and says, "Or is the greatest player Mantle?"