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: The first worm - dead. Second worm - dead. Third worm - dead. Fourth worm - alive.
Lesson: As long as you drink, smoke and have sex, you won't get worms!