What is wrong with fast food? That is the question that Carlos, who you read about in the beginning of the chapter, asked himself after learning that his friend Kevin eats it five or six times a week,...What is wrong with fast food? That is the question that Carlos, who you read about in the beginning of the chapter, asked himself after learning that his friend Kevin eats it five or six times a week, and thinks that this diet is not necessarily that bad for him.