Why do you think Charlie couldn't stop eating the chocolate?

Charlie Bucket comes from a very poor family. His folks barely have enough money for basic food, let alone luxuries like chocolate. All the other kids at school buy Wonka Bars like they're going out of fashion; they're desperate to get their hands on the prize golden ticket. But as Charlie's so dirt poor, he never gets the chance to buy a Wonka Bar, or any other kind of candy, for that matter. So when he finds some money in the gutter, he knows straight away what he intends to do with it. He heads straight off to the candy store and helps himself to a large Wonka Bar. Charlie wolfs down the chocolate; he doesn't stop until it's all gone and he's completely out of breath.
He does this because he's so completely excited at being able to buy a candy bar. For most kids, this is no big deal; they can afford to eat candy all the time. But not Charlie. His poor background means that this is a rare treat indeed, so we can understand just why he's so thrilled and why he can't wait to gobble down the chocolate as quickly as possible.