He's a teenager, with all the hormones and desires that come with that territory. But he's also a solitary figure, preferring his own company to that of his peers. So, he finds his solace in the privacy of his room, with his own hand and his own cock. He's not ashamed of his desires, he embraces them. He strokes his dick, feeling the pleasure build. He's not seeking release, just the comfort of his own touch. It's his secret, his solace, his escape from the world.