Old Fred, who is 72, goes to his doctor with the complaint that he can't perform as often as he'd like.

"Well, Fred", says the doc, "you ARE 72. How often do you do it?"

"Oh, maybe 3-4 times a month....but my neighbor is 80, and he says he makes love with his wife twice a week!"

"Well, Fred", replies the doc. "Can't you say that, too?"