Pay Back

A man walks into a pharmacy and wanders up and down the aisles.
The sales girl notices him and asks him if she can help him. He answers that he is looking for a box of tampons for his wife. She directs him down the correct aisle. A few minutes later he deposits a huge bag of cotton balls and a ball of string on the counter.
She says confused “Sir, I thought you were looking for some tampons for your wife.”
He answers, “You see, it’s like this. Yesterday I sent my wife to the store to get me a carton of cigarettes. She came back with a tin of tobacco and some rolling papers because it’s soooo much cheaper. So I figured, if I can roll my own, so can she. “