Billy takes a moment to recover from the sudden blast of culture shock. He knows about the concept of wildly different cultures in theory, of course, but it isn't always the easiest to react and adjust quickly when you'd never had to apply that knowledge.

He smiles apologetically at the two confused podmates, and somewhat wryly at the suggestion that a cheeseburger isn't food. His friends on Earth would have vehemently rejected that notion.

"I apologize---I would have explained the concept if I'd anticipated that you wouldn't be familiar with a cheeseburger. Cheeseburgers are a popular meal where I come from, but they're certainly not the most nutritious snack. Anyway, a cheeseburger is a slab of cooked meat topped by a melted slice of cheese, sandwiched between slices of bread. Its nutritional content mainly consists of protein, carbohydrates, and fat." Yay, junk food!