Cigarettes and tampons

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 some 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, and she came back with a tin of tobacco and some rolling papers; cause it's sooo-ooo--oo-ooo much cheaper.  So, I figure if I have to roll my own ......... so does she.”

Thanks Joe P