The old man goes to the doctor and says, "My wife can't hear very well anymore and I'm getting worried. What should I do to help her?"
The doctor thinks for a minute and says, "First we need to understand how serious the problem is. Stand 25 feet away from her and ask her a question. If she doesn't respond, walk 5 ft closer and ask again. Repeat this until she can hear you and then let me know how far away you were standing."
The man is so concerned for his wife that he agrees to do what the doctor suggested. When he gets home, he sees his wife cooking in the kitchen. He stands 25 feet from his wife and says, "What's for dinner?"
The wife does not answer and he walks closer, "What's for dinner?"
The man does this 2 more times until he is standing only 5 feet from his wife. The man is now very worried and tries one last time, "What's for dinner?"
The wife looks over and yells at him, "THIS IS THE FOURTH TIME I'M TELLING YOU, WE'RE HAVING LASAGNA!"