Paybacks

A man walks into the store to buy some tampons for his wife.
After walking around, unable to find them, he asks a clerk for assistance.
She walks him over to the isle where they are and he thanks her.
A few minutes later he walks up to the cash register and puts down a big
bag of cotton balls and a roll of string.
Confused, the cashier says, "I thought you were after tampons for your
wife?" The man says, "It's like this... Last week I sent my wife to the
store to get me a carton of cigarettes and she came back with a box of
papers and a pouch of tobacco. I figure if I gotta roll my own, so does
she."