Two men are playing golf one afternoon and get caught behind two women playing very slowly. After a few holes, one of the men decides to go say something to them. He gets halfway there, suddenly stops, and comes slinking back to his buddy.

“What happened?” asked the second man.

“Well, when I got halfway there I realized one of the women is my wife and the other is my mistress.”

“I'll go talk to them,” says the second man. He starts heading toward them, when suddenly he stops quickly, turns around, and slinks back.

“What happened?” asks the first man.

“Small world,” he replies.