A chemistry professor wanted to teach his fifth-grade class about the dangers of alcohol. He set up an experiment with a glass of water, a glass of whiskey, and two worms.
"Now, class, observe closely," said the professor, placing the first worm into the water. The worm wriggled happily.
He then placed the second worm into the whiskey. It curled up, writhed in pain, and quickly sank to the bottom, dead.
"So, what lesson can we learn from this?" the professor asked.
Johnny, who sat at the back, raised his hand and confidently replied, "If you drink whiskey, you won't get worms."