"What Was That For?" joke

This man was sitting quietly reading his paper one morning, peacefully enjoying himself, when his wife sneaks up behind him and whacks him on the back of his head with a huge frying pan.

MAN: "What was that for?"

WIFE: "What was that piece of paper in your pants pocket with the name Marylou written on it?"

MAN: "Oh honey, remember two weeks ago when I went to the horse races? Marylou was the name of one of the horses I bet on."

The wife looked all satisfied, apologizes, and goes off to do work around the house. Three days later he is once again sitting in his chair reading and she repeats the frying pan swatting.

MAN: "What was that for this time?"

WIFE: "Your horse phoned."