The owner of this drug store walks in to find a guy leaning heavily against a wall. The owner asks the clerk "What's with that guy over there by the wall? "The clerk goes "Well, he came in here this morning to get something for his cough. I couldn't find the cough syrup, so I gave him an entire bottle of laxative." The owner goes "You idiot!" You can't treat a cough with a bottle of laxatives!" The clerk goes "Of course you can! Look at him; he's afraid to cough!"