"What's with that guy over there by the wall?" ask the owner

"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." Replied the clerk.

"You idiot!" Yelled the owner" You can't treat a cough with a bottle of laxatives!"

"Of course you can!" replied the clerk, "Look at him; he's afraid to cough!"