Is there a science behind why we think of some foods as breakfast and others as not? We eat certain foods for breakfast because we think of them as breakfast foods, and we think of them as breakfast foods because we tend to eat them for breakfast. And cultures all around the world have different categories of what is and isn’t breakfast food. That’s all to say that the specific foods people eat for breakfast are a product of the culture they live in. The breakfast conspiracyOrange juice, bacon, and eggs—the all-American breakfast throughout history.