Bill and Bob have tended bar together for years. One day Bill says, "I love my wife, but sometimes I get bored. Tell me, have you ever thought of switching? Who says you have to be with your wife and I have to be with my wife all the time!"

Bob says, "Hey, that's a great idea. Let's talk to our wives and see what they think."

Each of them talks to his wife, and much to their delight the wives agree to the plan.

The next morning Bob says to Bill, "How was it for you?"

Bill says, "I had a lot of fun, we should do this again."

"That's what I think," says Bob. "Let's go next door and see how the girls made out."