After retiring, Joe does nothing except sit around the house all day.
Fed up, his wife says, "Joe, you could do something useful, like vacuum the house once a week." Joe looks at her for a moment and says, "Sure, why not. Where's the vacuum?"
Half an hour later, he walks into the kitchen to get a coffee and his wife says, "I didn't hear the vacuum running. I thought you were going to use it."
Exasperated, Joe says, "The stupid thing is broken. It won't start. We need to buy a new one."
"Really", she questions, "Show me - It worked fine the last time I used it."