Book excerpt: Here is the great American ritual of supermarket shopping in all its Muzak-drenched, fluorescent-lit, coupon-clipped glory. In this fascinating expedition through the world of polished linoleum-tiled aisles, find out why peanut butter doesn't stick to the roof of your mouth anymore, discover the lost connection between graham crackers and sex, and learn what's really in the mysterious stuff they call Cool Whip. Join author Vince Staten on his humorous and revealing journey through the secret life of our favorite supermarket items, as he uncovers the hidden histories and fascinating folklore behind the foods we take for granted. The results are truly amazing and reveal the answers to such questions as: Which has more lemon in it, Lemon Pledge or Country Time Lemonade? What is Spam-- and why is it so darn popular? What happened to the vanilla in Nabisco Nilla Wafers? Who thought of putting American cheese in an aerosol can, and is it really cheese, anyway?