A blindfolded beauty, bound at the wrists, eagerly awaits the sensation of the cold, hard metal urethral sound. Her captor, unseen, teases her with gentle strokes and pinches, making her squirm with anticipation. The sound is inserted, slow and steady, as she moans in pleasure-pain, feeling every ridge and curve against her vulnerable urethra. Her tormentor twists and pulls, stretching her balls, as she takes the sound deeper, gagging and drooling.