On his 74th birthday, a man in Colorado received a gift certificate from his wife. The certificate paid for a visit to a medicine man living on a nearby reservation. The medicine man was rumored to have a wonderful cure for erectile dysfunction.
After being persuaded, he drove to the reservation, handed his ticket to the medicine man, all the time wondering what was to come.
The old medicine man slowly and methodically produced a potion, which he handed to the 74 year-old. Gripping his shoulder, the medicine man warned, "This is powerful medicine and it must be respected. You take only a teaspoonful and then say '1-2-3'. When you do that, you will become manlier than you have ever been in your life and you will be able to perform as long as you want."
"0kay." The old man was encouraged. As he walked away, he turned and asked, "How do I stop the medicine from working?"
"Your partner must say '1-2-3-4,'" the medicine man responded.
"When she does that, the medicine will not work again until the next full moon."
The old man was very eager to see if the potion worked, so he went home, showered, shaved, took a spoonful of the medicine, and then invited his wife to join him in the bedroom.
When she came in, he took off his clothes and said, "1-2-3!" Immediately, he was the manliest of men.
His wife was excited and began throwing off her clothes. And then she asked, "What was the 1-2-3 for?"
And that, boys and girls, is why we should never end our sentences with a preposition – or one will end up with a dangling participle!