Never end a sentence with a preposition
Harry is getting along in years and finds that he is
unable to perform sexually. He finally goes to his
doctor who tries a few things, but nothing seems to
work. So the doctor refers him to an American Indian
medicine man.
The medicine man says, "I can cure this." That said,
he throws a white powder in a flame, and there is a
flash with billowing blue smoke.
Then he says, "This is powerful medicine. 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?"
The medicine man replies: "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."
Harry rushes home, eager to try out his new powers
and prowess.
That night he is ready to surprise Joyce. He
showers, shaves, and puts on his most exotic shaving
lotion. He gets into bed, and lying next to her
says, "123." He suddenly becomes more aroused than
anytime in his life -just as the medicine man had
promised.
Joyce, who had been facing away, turns over and
asks, "What did you say 123 for?"
And now you know why you shouldn't end a sentence
with a preposition.