In a dimly lit dungeon, a femdom enthusiast ties her sub's hands behind his back, exposing his crotch. She grabs a steel-toed boot and begins to kick his balls, each impact echoing through the room. He cries out, his body convulsing, but she silences him with a look. She then takes out a ball stretcher, slowly pulling it taut around his scrotum, causing him to gasp and moan in equal parts pain and pleasure. This is her playground, and he's her willing toy.