A man walks out of a bar and sees a bum panhandling on the corner. The bum says, "Mister, can you spare a dollar?"

The man thinks a minute. Then he asks the bum, "If I give you a dollar, are you going to use it to buy liquor?"

"No," says the bum.

The man then asks, "If I give you a dollar, are you going to use it for gambling?"

Again the bum says, "No."

So the man says to the bum, "Do you mind coming home with me so I can show my wife what happens to someone who doesn't drink or gamble?"