In a moment of solitude, a dark-skinned stud, known for his generous endowment, lets his hand wander to his crotch. He strokes his substantial length, his grip tight and rhythm steady. Lost in his own world, he doesn't hear the door creak open. Just as he's about to reach his peak, a voice calls out, "What are you doing?" Startled, he quickly tucks himself away, his face a mix of embarrassment and lingering lust.