Bound tightly, a submissive male awaits the cruel delights of his dominant mistress. She teases him with a whisper of a touch, her fingers tracing his length, before inserting a urethral sound. His gasps echo as she expertly manipulates the metal, stretching his urethra inch by inch, drawing out a mix of pleasure and pain. Precum beads at his tip, and his breathing grows ragged as she increases the intensity, pushing him closer to the edge.