A seventh grade Biology teacher arranged a demonstration for his class.
He took two earth worms and in front of the class he did the following:
He dropped the first worm into a beaker of water where it dropped to the
bottom and wriggled about. He dropped the second worm into a beaker of Ethyl
alchohol and it immediately shriveled up and died. He asked the class if
anyone knew what this demonstration was intended to show them.

A boy in the second row immediately shot his arm up and, when called on said:
Youre showing us that if you drink alcohol, you wont have worms.