The Birthday Gift

On his 70th birthday, 

a man was given a gift certificate from his wife. The
certificate was for consultation with an Indian medicine
man  living on a nearby reservation who was rumored to
have a simple cure for erectile dysfunction.  

The husband went to the reservation and saw the medicine
man. The old Indian gave him a potion and, with a grip on his
shoulder, warned ‘This is a powerful medicine.  You
take only a teaspoonful, and then say: ‘1-2-3.'
When you do, you will
become more manly than you have ever been in your
life, and you can perform for as long as you want."  The
man thanked the old Indian, and as he walked away, he 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."
He was very eager to see if it 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 asked:  "What was the 1-2-3 for?" 

And that, boys and girls, is why we should never end our
sentences with a preposition, because we could end up with a
dangling participle.