Mark and Steve are at their weekly golf game when they catch up to a pair of women playing ahead of them. It's clear the women are just playing for fun--their balls are flying wide, their putting is atrocious. Meanwhile, the two men are wasting time waiting behind the women to move on.
Finally, Mark says, "I'm going to ask those ladies if they mind if we play through." He heads in their direction, then spins on his heel and walks briskly back, red-faced.
"Whew, that was a close one," Mark said. "You'll have to ask them, Steve. One of them is my wife, and the other is my mistress."
"I understand completely," says Steve. "You hang back here and I'll go ask."
Steve heads towards the women, then likewise turns on his heel and walks back to Mark, red-faced and shaking his head.
"Wow", says Steve. "What a small world, huh?"