On his 74th birthday, a man got a gift certificate from his wife.

The certificate paid for a visit to a herbalist living nearby, who was rumoured to have a wonderful cure for erectile dysfunction.

After some discussion with his wife, the man made a visit to the herbalist and handed his voucher over wondering what he was in for. The elderly herbalist handed a potion to the man, and with a grip on his shoulder warned him.

"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 as long as you want."

Greatly encouraged, the man turned and started to walk away, then stopped and asked, "How do I stop the medicine from working?"

The herbalist replied, "Your partner must say '1-2-3-4,' but when she does, the medicine will not work again until the next full moon."

Eager to see if it worked the man 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 because we could end up with a dangling participle.