Dirk should definitely be in class right now, but he doesn't want to be so he's not. There will probably be consequences for skipping, but he can't be bothered to care at the moment. He's way more interested in admiring the masterpiece he just finished spray-painting on one of the more obscured sides of a building. It's the shittiest possible painting of a dog anyone has ever done. What a perfect homage to his bro's work.