In the dimly lit room, a curious young man explores the limits of his pleasure. His small, uncut cock throbs as he lubes up, his urethra pulsing with anticipation. With a deep breath, he inserts a thin metal sound, feeling every inch as it glides in, stretching his urethra. His body shudders with sensation, his balls tightening as he strokes his shaft, pre-cum leaking from his slit. The sound fully inserted, he gasps, his eyes rolling back as he begins to fuck it gently, his cock sliding against the cool metal.