When Cybill Troy catches her rubber gimp slave jerking off, she decides to damage his dick so badly that he won't even be able to get hard for a good long while. Flattening his nuts out in the excruciating sound-activated electric ball crusher is only the beginning, ensuring he won't scream too loudly during his torments... at least not without soul-crushing electrical zaps.
Cybill skewers his cock with thick steel needles, twisting them around to be sure he's left good and bruised, electrifying the needles in his flesh with the strongest violet wand available for good measure.