Worms in alcohol, cigarette smoke and chocolate syrup

A minister decided that a visual demonstration would add emphasis to his Sunday sermon. Four worms were placed into four separate jars: The first worm was put into a container of alcohol. The second worm was put into a container of cigarette smoke. The third worm was put into a container of chocolate syrup. The fourth worm was put into a container of good clean soil. At the conclusion of the sermon, the Minister reported the following results:

The first worm in alcohol - Dead. The second worm in cigarette smoke - Dead. Third worm in chocolate syrup - Dead. Fourth worm in good clean soil - Alive.

So the Minister asked the congregation - What can you learn from this demonstration? A little old woman in the back quickly raised her hand and said, "As long as you drink, smoke or eat chocolate, you won't have worms!"