Perv80bl, bound and blindfolded, awaits their Master's touch. The Master, cruel and commanding, begins a rigorous CBT session, pinching and twisting Perv80bl's nipples, before moving south to the erect cock. They grab a urethral sound, cold and hard, and forcefully insert it into Perv80bl's urethra. Perv80bl cries out, but the Master silences them with a slap, continuing to violate the sensitive passage with the sound, causing Perv80bl to writhe and beg for mercy. The Master, satisfied with Perv80bl's suffering, finally removes the sound, leaving Perv80bl's urethra gaping and dripping.