Three golfers, John, Jerry, and Matthew are looking for a fourth. John mentions that his friend Michael is a pretty good golfer, so they decide to invite him for the following Saturday.
"Sure, I'd love to play," says Michael, "but I may be about ten minutes late, so wait for me."
Saturday rolls around. John, Jerry, and Matthew arrive promptly at 6:00 and find Michael already waiting for them. He plays right-handed and beats them all. Quite pleased with their new fourth, they ask him if he'd like to play again the following Saturday.
"Yeah, sounds great," says Michael, "But I maybe about ten minutes late, so wait for me."
The following Saturday, again, all four golfers show up on time, but this time Michael plays left-handed and beats them all. As they're getting ready to leave, Michael says, "See you next Saturday, but I may be about ten minutes late, so wait for me."
Week after week, Michael is right on time and plays great with whichever hand he decides to use. And every week, he departs with the same message.
After a couple of months, Matthew is pretty tired of this routine, so he says, "Wait a minute, Michael. Every week you say you may be about ten minutes late, but you're right on time. You beat us either left-handed or right-handed. What's your story?"
"Well," Michael says, "I'm kind of superstitious. When I get up in the morning, I look at my wife. If she's sleeping on her left side, I play left-handed, and if she's sleeping on her right side, I play right-handed."
"So what do you do if she's sleeping on her back?" Jerry asks.
"Well...that's when I'm about ten minutes late."
