In this masterclass of CBT (Cock and Ball Torture), Krad Yar bares all, quite literally, as he subjects his most intimate parts to the mercy of urethral sounding. The marbles, cold and hard, push against his prostate, sending waves of pleasure-pain through his body. He grits his teeth, beads of sweat forming on his forehead as he fights to maintain control, his cock leaking pre-cum in response to the intense stimulation. The final marble, the largest one, stretches his urethra to its limit, a challenge that Krad Yar eagerly accepts, pushing through the intense sensation to fill himself completely.