A curious teen boy, hidden away in his private space, decides to indulge in a taboo pleasure, urethral sounding. With a coy grin, he selects a slender, polished metal sound, coating it in lubricant as his pulse quickens. Closing his eyes, he guides the tip of the sound into his urethra, his breath catching as the intense sensation courses through him. Each careful thrust sends waves of pleasure-pain through his cock, his body tensing and releasing as he pushes the sound deeper. His first urethral exploration is a symphony of new feelings, culminating in a powerful orgasm as he withdraws the sound, leaving him panting and spent, a secret smile playing on his lips.