A chemist walks into his shop to find a man leaning against the wall. "What's wrong with him?" he asks his assistant."He came in for some cough syrup," the assistant explains. "But I couldn't find any, so I sold him a bottle of laxatives instead.""What!" the chemist says, horrified. "You can't treat a cough with laxatives!""Of course you can," the assistant declares. "Look at him - he's far to scared to cough."