Mariano, a curious first-timer, tentatively explores the art of masturbation. His hands, slightly trembling with anticipation, wrap around his stiffening member. He's in his room, the door locked, the world outside forgotten. He watches, fascinated, as his cock grows harder, the tip purple and leaking. He discovers the sensitive spots, the rhythm that makes his body tense and coil. His strokes become faster, his breathing heavier, until finally, with a low groan, he comes, his body jerking as his hot cum spills over his hand.