A teacher in a high school, famous for his high regard for social values, was teaching the students on the harms of alcohol.
To demonstrate its adverse effect on the human nervous system, he took a worm and dropped it into a bowl of gin & tonic.
The worm wriggled around for a few minutes before finally giving a few convulsive twitches and dying.
“So what can you conclude from it?”, asked the teacher, expecting that the answer is too obvious.
“Yes,” came a voice from the back, “if you have got worms in your stomach, alcohol is a real medicine for that.”