The first guy said, "You know, I'm really lucky. When my wife makes love, she's like an acrobat. She can get into the most incredible positions."

The second guy said, "I'm lucky, too. My wife is like a world-class pianist when we have sex. She's got the most talented hands you can imagine." No one spoke for a moment. Then the first guy said to the third guy,

"George how's you wife in bed?"

George took a sip of his beer, then replied, "I guess you could say that my wife makes love like a chess player."

"A chess player?"

"Yeah. Every twenty minutes, she moves."