Johnny's raisins.
Everybody has something that makes them feel secure, as long as they have enough of it. I buy dental floss pretty much every time I go to the drugstore. Maggie's grandpa had extension cords in every drawer of his house. Susan Cataldo's most memorable observation was that buying a four-pack of toilet paper made you feel like you were going to be around for a while. I guess that's it: I'll live long enough to need all this floss. Will I outlive the ink cartridge, the staples, the socks I just bought? When is it time to stop adding on?