This is from a getleman in Arkansas

On
my 70th birthday, I got a gift certificate from
my wife. The certificate paid for a visit
to a medicine man living on a nearby
reservation who was rumored to have a wonderful
cure for erectile dysfunction. After being
persuaded, I drove to the reservation, handed my
ticket to the medicine man and wondered what
would happen next.

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 become more manly than you have ever been
in your life and you can perform as long as
you want."

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

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

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

Immediately,
I was the manliest of men. My wife was excited
and began throwing off her clothes. And then she
asked, "What was the 1-2-3
for?"

And

that,,

is why we should never end
our sentences with a
preposition!