"Harry," whined Mary, to her husband of 20 years. "What should I do?! I'm not ready for old age! I'm only 40 years old but I look and feel like I'm over 55! My face is all wrinkly, my back is bent over, and my hair is all thinned out."
"Well," said Harry after looking her up and down, "There is one thing about you that still works as good as new."
"Oh Harry!" said Mary sitting down next to her husband, "you always know just what to say! What are you referring to?"
"Never mind" said Harry looking down.
"C'mon Harry, please tell me what you were referring to."
"Mary, please don't make me."
"Harry I insist."
"Well I was going to remark about how your eyesight seems to be working just fine!"