Teenagers in A Clockwork Orange

So far, I have noticed that teenagers in A Clockwork Orange are very different from the teenagers of our generation. It is normal for the teenagers in A Clockwork Orange to dress up fancy and look really nice, which is almost the opposite of how the average teenager dresses today. Teenagers now usually dress comfortably, not normally wearing dress pants and a dress shirt every day. Also, the 'popular' music in A Clockwork Orange is classical music. I think this is very interesting because pop music now is very upbeat and has electric instruments, but classical is the opposite. Lastly, the teenagers in A Clockwork Orange act very sophisticated like it is a normal thing. Most teenagers now try to act 'cool' and are immature. I think it is very interesting how the author made the teenagers in his book so different. I wonder why he did this.