The owner of a 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 says, "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 says, "You idiot! You
can't treat a cough with laxatives!"
The clerk says, "Oh yeah? Look at
him, he's afraid to cough!"