An elderly man walks into a house of ill repute and tells the madam that he would like a young woman for the night. The madam gives him a puzzled look and asks, "Just how old are you, mister?"

"Why," the old patron says, "I'm 98 years old today!"

"Ninety-eight!" the madam exclaims.
"Don't you realize you've had it?"

"Oh," he says, "then how much do I owe you?"