An old man said to his doctor, “Doc, tomorrow’s my eightieth birthday. I want to do it just one more time before I die, so I’ve hired a hooker for the night. Can you give me something to get it up?” The doctor smiled. “Normally, I don’t prescribe this stuff, but in your case, I could probably make an exception.” On the night of the “celebration,” the doctor got curious and phoned the man. “How’s it going?” “Fabulous,” replied the old man. “I’ve come three times already!” “Great,” said the doctor. “I’ll bet the hooker is astounded.” “Not exactly,” said the old man. “She’s not here yet!”