A ninety-year-old man lived in a rest home and got a weekend pass.
He stopped in his favorite bar and sat at the end and ordered a
drink. He noticed a seventy-year-old woman at the other end of the
bar and he told the bartender to buy the lovely young lady a drink.
As the evening progressed, the old man joined the lady and they went
to her apartment, where they got it on.

Four days later, the old man noticed that he was developing a drip 
and he headed for the rest home doctor. After careful examination the
doctor asked the old man if he had engaged in sex recently.

The old man said, "Sure!"

The doctor asked if he could remember who the woman was and where she
lived. 

"Sure, why?"

"Well you'd better get over there, you're about to cum!"