After a few years of married life, a man finds that he is unable to perform. He goes to his doctor who tries a few things but nothing seems to work. So the doctor refers him to a witch doctor.
The witch doctor says, "I can cure this." He throws a white powder in a flame, and there is a flash with billowing blue smoke. Then he says, "This is powerful healing but you can only use it once a year. All you have to do is say '123,' and it shall rise for as long as you wish!"
The guy then asks, "What happens when it's over, and I don't want to continue?"
"All you or your partner has to say is '1234,' and it will go down. But be warned: It will not work again for another year."
The guy goes home, and that night he is ready to surprise his wife. He showers, shaves, and puts on his most exotic shaving lotion. After he gets into bed and is lying next to her, he says, "123," and suddenly he gets an erection just as the witch doctor said. His wife was facing the other way and turns over and says, "What did you say '123' for?"