confused

A man walks into a pharmacy and tells the salesgirl that he's looking for a box of tampons for his wife. She directs him to the correct aisle. A few minutes later, he deposits a huge bag of cotton balls on the counter.

She says, confused, "Sir, I thought you were looking for tampons for your wife?"

"You see, it's like this. Yesterday, I sent my wife to the store to get me a carton of cigarettes, and she came home with a tin of tobacco and some rolling paper. So, I figure, if I have to roll my own, so does she."