I trample my slave's balls hard in a fun shoejob sesh in my flats. I jump on, grind on, step on, and put my weight down on his balls. I love stepping on his cock and balls fully and see them smush out of the sides on my flats with nowhere to go. I know he likes my sweaty soles after I wear flats all day so I keep teasing him by letting him see my arches as I tippy toe and concentrate all pressure on his balls until they're emptied.