Bologna, cheese and Wonder Bread: It's a vivid memory for us Americans. Just as vivid, that childhood sandwich would invariably get stuck to the roof of your mouth. With no sandblaster to remove it (not without adult supervision, anyway), you had to reach deep into your mouth and scrape it loose with your index finger. At which point you'd narrowly avoid choking to death. Even today, in school cafeterias across the nation, most kids' introduction to cold cuts and cheese is a near-death experience.