Tommy owned a Chemists shop and one day popped in to check on his new assistant and found a chap leaning heavily against a wall with an odd look on his face.

Tommy asked the new assistant "What's with that chap over there by the wall?"

The assistant said "Well, he came in here at 7 A.M. to get something for his cough. I couldn't find the cough medicine so I gave him an entire bottle of laxatives."

Tommy said "You idiot! You can't treat a cough with laxatives!"

The assistant said "Oh yeah? Look at him-he's afraid to cough!"