Two men are playing golf. They play each week, and have a
wager as to who is going to win.
One week there are these two women at the hole ahead of
them. They're hitting the ball all over the place. They
have no idea how to play. They're just there having a
good old time.
The two men want to finish their game. One of them decides
to ask the women if they can play through. He goes up the
hill, then comes back down. He tells his friend "I can't
do it. One's my wife, the other's my mistress."
The other guy says "No problem, I understand."
So he goes up the hill. He comes back down and says,
"Small world isn't it?"