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. Second worm in cigarette smoke - dead. Third worm in sperm - dead. Fourth worm in soil - alive. So the Science teacher asked the class - "What can you learn from this experiment?" Little Johnny quickly raised his hand and said "As long as you drink, smoke and have sex, you won't have worms."