My five-year-old watched me make a sandwich and said, 'Dad, why do you put the bread on the plate first?' I said, 'Because it's the base.' He said, 'The bread is not a base. The bread is a rectangle. You put a rectangle on a plate. Then you put another rectangle on top. Then there's a sandwich in between. You didn't build a sandwich. You made a bread sandwich. You trapped a sandwich between two breads.'