Picture a scene in a nursing home.
In the day room, all the old folk are in their armchairs, watching television.
An old, old man leans over to the old woman next to him, and says "I bet you can't tell how old I am!"
The old woman looks at him for a moment, then says "OK then, show me your willy!"
The old man looks confused, but he fumbles around in his lap and a moment later, brings it out.
The old lady leans over and peers over the top of her spectacles for a moment. "Humph," she says, "91".
The old man was flabbergasted. He said: "Why, you're absolutely correct!! But how on earth could you tell???"
The old lady looked at him severely, and said: "You told me yesterday!"
Mel