A husband and wife are sitting in their living room after a hearty dinner, reading the paper. Without warning, the husband lets go of a long, satisfying fart. The wife, highly indignant, says, "Excuse yourself!"

"Excuse me," the man mumbles.

"I mean, from the room."

Suddenly a voice emanating from the four walls booms: "Why should I excuse myself? He's the one who farted!"