10 Minutes Late

Three golfers, Bob, Max and Ted, 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." So Saturday rolls
around. Bob, Max, and Ted arrive promptly at 9:00 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
ten minutes late, so wait for me." The following Saturday, again, all four
golfers show up on time, but this time George plays left-handed and beats
them all. As they're getting ready to leave, George says, "See you next
Saturday, but I may be about ten 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 months, Ted is pretty tired of this routine, so he says, "Wait a
minute, George. 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 the story?" "Well," George 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?" Bob
asks. "Well... That's when I'm about ten minutes late."