Six Feet

A wife was in bed with her lover when she heard her husband's key in the door.
- Stay where you are, she said. He's so drunk he won't even notice you're in bed with me.
Sure enough, the husband lurched into bed none the wiser, but a few minutes later, through a drunken haze, he saw six feet sticking out at the end of the bed.
He turned to his wife :
- Hey, there are six feet in this bed. There should only be four. What's going on ?
- Nonsense, said the wife. You're so drunk you miscounted.
Get out of bed and try again. You can see better from over there.
The husband climbed out of bed and counted.
- One, two, three, four. You're right, you know.