A man walks into a pharmacy and wanders up and down the aisles, looking at many things. After some time passes, 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 brings a huge bag of cotton balls and a ball of string and places them on the counter.
Dumbfounded, she says, "Sir, I don't want to be nosy and feel free not to answer me... but thought you were looking for some tampons for your wife. You don't seem to have any and you bought some other, seemingly random things. What gives?"
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; because "it's sooooooo much cheaper". So, I figure if I have to roll my own - so does she."