Judging

Why do people judge one another, in school if a new kid is coming to class, as soon as she walks through the door everyone judges her/him. Why do you need to judge? It's there body they can where what they want. Then once they meet them they start judging them about what they listens to or who they like or there favorite celebrities, even there favorite color. People can't judge a book by it's cover and they shouldn't judge whats in the book either, they can where whatever they want, how would you feel if people judge you of what you were wearing.