Medical breakthrough

[daytripper]

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:

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!