A man goes to his doctor and tells him that he is worried about his wife's hearing. "I'm sure she is going deaf doctor. I often ask her questions and she doesn't hear me. How can I test her hearing without her knowing?"
The doctor thinks for a few seconds and replies, "The next time you walk into a room and her back is toward you, simply ask her a question in a soft voice and see if she answers. Keep asking the same question until she replies and just ask a little louder each time. You should be able to gauge her deafness by how loud you have to speak for her to hear you".
Later that afternoon he returns home and walks into the kitchen to find his wife washing dishes with her back toward him. Quietly he asks, "What's for tea dear?" to which he gets no reply. He tries again. "What's for tea dear?" Still he gets no reply. He walks closer to his wife and says, a little louder this time, "What's for tea dear?"
At this point his wife spins round and screams into his face, "FOR THE THIRD TIME, STEAK AND F
G CHIPS!!"