An old man who is in his nineties goes to his doctor and asks him, “Please Doctor, I want my sex drive lowered”.
“But Mr. Johnson”, the doctor replied, “you are in your nineties. Don’t you think that at your age your sex drive is all in your head?”
“You’re damned right it is!” replied the old man. “That’s the problem and that’s why I want it lowered!”
Image used under a Collective Commons License from: https://www.flickr.com/photos/thomasleuthard/5198470559