Lisa came up behind her husband while he was drinking his morning coffee and slapped him on the back of the head.
"Ow!" Larry exclaimed. "What was that for?"
"I found a piece of paper in your pants with the name 'Mary Lou' written on it," she said angrily. "You better have a good explanation!"
"Calm down, honey," Larry said. "I was at the dog track last week and that was the name of the dog I bet on."
Later that same day, Lisa walked up to her husband and smacked him hard on the forehead when he walked in the door from work.
"What the heck was that for?" he demanded.
"Your dog just called."