A man mentions to his doctor that his wife's hearing doesn't seem to be as good as it used to be, and asks what he should do. The doctor suggests a small test to confirm the amount of hearing loss: "Next time your wife is in the kitchen doing dishes, stand fifteen feet behind her and ask her a question. If she doesn't respond, keep moving closer and asking the question again until she hears you."
So the man goes home, and his wife is preparing dinner in the kitchen. Opportunity knocks: he stands in the hallway and asks, "What is for dinner, honey?" No answer. So he moves into the kitchen, just inside the door, and asks again. No answer. So he moves closer, almost to arm's length, and asks again: and still he gets no answer.
Finally, when he is standing directly behind her, he asks the same question a fourth time; and she answers: "For the fourth time, I SAID CHICKEN!"