The doctor replies, "Try this test to find out for sure. When your wife is in the kitchen doing dishes, stand 15 feet behind her and ask her a question, if she doesn't respond keep moving closer and asking the question until she hears you."
The man goes home and sees his wife preparing dinner. He stands 15 feet behind her and says, "What's for dinner, honey?"
He gets no response, so he moves to 10 feet behind her and asks again.
Still no response, so he moves to five feet--still no answer.
Finally he stands directly behind her and says, "Honey, what's for dinner?"
She replies, "For the fourth time, I SAID CHICKEN!"