It was the first day of Biology for a group of teenagers. The professor had arranged a short demonstration for the class.
He took a worm and dropped it into a glass of water. The worm wriggled about in the water.
Then he took a second worm and dropped it into a glass of alcohol.
The worm immediately died.
The professor asked the students if anyone knew what the point of the demonstration was.
A boy raised his hand and said, “You’re showing us that if we drink alcohol, we won’t have worms.”