Attending a recent conference on nutrition and health, of all things, I was astounded to see that in addition to the copious buffet at breakfast, lunch, and dinner, our hosts wheeled out a copious buffet halfway between breakfast and lunch and then again halfway between lunch and dinner, evidently worried that we would not be able to survive the long crossing from one meal to the next without a between-meal meal.

—Michael Pollan, In Defense of Food: an Eater's Manifesto