An old man is walking in town and sees a hooker standing at her door.
She asks him: "Granddad, why don't we give it a try?”
"No girl, that is no longer possible for me” he replies.
Says the hooker: "Come on, what have we got to lose, we can give it a try!?”
They both go inside. They undress and then he acts like a young man and performs 5 times in a row
"Oh, my goodness", says the hooker, breathless "and you said that it was no longer possible for you?!”
Says the old man: “Oh, screwing is still going well, it's the paying for it that is no longer possible..”