Drink and No Worms

A professor of chemistry wanted to teach his 5th grade
class a lesson about the evils of liquor, so he produced
an experiment that involved a glass of water, a glass of
whiskey, and two worms.

"Now, class, closely observe the worms," said the professor
while putting a worm into the water.

The worm in the water writhed about, happy as a worm in
water could be. He then put the second worm into the
whiskey. It curled up and writhed about painfully, then
quickly sank to the bottom, dead as a doornail.

"Now, what lesson can we learn from this experiment?" the
professor asked.

Johnny, who naturally sits in back, raised his hand and
wisely, responded confidently, "Drink whiskey and you
won't get worms."

P/S: courtesy from my aunt