There are three golfers, (Bob, Max and Ted) who are looking for a
fourth. Bob mentions that his friend George is a pretty good golfer,
so they decide to invite him for the following Saturday.

“Sure, I’d love to play,” says George, “but I may be about ten minutes
late, so wait for me.”

Come Saturday the original three arrive promptly at 9 and find George
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 George. “But I may be about 10 minutes late
so wait for me.”

The following Saturday they all arrive and find George already there.
But this time George plays left-handed, and still beats them all. As
they get ready to leave, George says, “I’ll see you all next Saturday,
but I may be 10 minutes late so wait for me.”

Every week George 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, Ted is pretty tired of this routine, so he
says, “Wait a minute George. Every week you say you may be 10 minutes
late and you are always on time, then you beat us either right or left
handed. What’s the story?”

“Well,” George says, “I’m kinda superstitious, When I get up in the
morning, I look at my wife, if she is sleeping on her left side, I
play left handed, and if she’s sleeping on her right, I play right
handed.”

“So what do you do if she is sleeping on her back?” Bob asks. “Then
I’m 10 minutes late,” George replies.