After being persuaded, I drove to the reservation, handed my gift certificate to the shaman, and wondered what I was in for. The old man slowly, methodically produced a potion, handed it to me, and with a grip on my shoulder, 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 be longer and harder than you have ever been in your life and you can perform as long as you want."

I was encouraged. As he walked away, I turned and asked, "How do I stop the medicine from working?"

"Your partner must say '1-2-3-4,'" the shaman responded. "But when she does, the medicine will not work again until the next full moon."

I was eager to see if it worked. I went home, showered, shaved, took a spoonful of the medicine, and then invited Cara to join me in the bedroom. When she came in, I took off my clothes and said, "1-2-3!"   Immediately, I was as the manliest of men.

Cara 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.