In a school science class four worms were placed into four separate jars. The first worm was put into a jar of alcohol. The second worm was put into a jar of cigarette smoke. The third worm was put into a jar of sperm. The fourth worm was put into a jar of soil.

After one day, these were the results:

The first worm in alcohol – dead.

The second worm in cigarette smoke – dead.

The third worm in sperm – dead.

The fourth worm in soil – alive.

So the science teacher asked the class, “What can you learn from this experiment?”

Little David quickly raised his hand and said, “As long as you drink, smoke, and have sex, you won’t have worms.”