A man drinks a shot of whisky every night before bed. After years of this, his wife wants him to quit; she gets two shot glasses,...

A man drinks a shot of whisky every night before bed. After years of this, his wife wants him to quit; she gets two shot glasses, filling one with water and the other with whisky.
After getting him to the table that has the glasses, she brings his bait box. She says, "I want you to see this." She puts a worm in the water, and it swims around.
She puts a worm in the whisky, and the worm dies immediately. She then says, feeling that she has made her point clear, "What do you have to say about this experiment?"
He says, "If I drink whisky, I won't get worms!"