You shouldn't care about how much someone eats.
Oscar has a large friend named Tom, whom he thinks is too heavy, and is eating at a restaurant with him.
Oscar wants to help Tom lose weight.
Oscar offers to start an exercise routine with Tom to get in better shape.
Oscar tells Tom that he needs to cut down on how much food he eats, so he doesn't die.
Tom exercises more and loses weight despite his bad diet.
Tom refuses to give up the food he loves and suffers a heart attack.