Whumpees begging for a different torture then the one currently being used on them is, great!
like "no not that, get away! Anything else but that!" As its cut into their skin, they hate the other tortures as well, BUT this one they hate just so much more that they'd want something else entirely!
Like for non human whumpees or half human ones like were-humans or whatever those ones that have little features of the creature its based on, on their bodies are called. They are threaten with removable or damaged to it if they don't listen and comply to whumper without a fight or struggle. Then are left alone with the pain everywhere else on their body after the torture, the one they begged not to be used on them or a different one entirely.
Then they mess up and the whumper ends up using a even worse torture then what they threatening them with before, but both are awful; (the threat to the features, burning them, cutting them, skinning or removing them, ect) that list could go on!
They end up giving in half way just so it'd stop, they even try to not make a sound or be loud. Anything just to stop it but it doesn't till its over.
for skinning the whumpee, they show off the pieces of flesh that was removed with the non-human features/parts of it to the whumpee saying that if they don't do it right this'll happen again to them.
Their feature if its still attached to them or the area where it was is more sensitive when touched or hit now, so the whumper ends up hitting it as punishment when they do something wrong, it ends up getting them to push harder when doing orders and it works.
They can force whumpee to use the same torture on another nonhuman whumpee and watch as the other breaks down as everything is destroyed.
Another is something similar with a villian or hero threatening that same torture, after or prior to other torture done before. The character trying to be brave and not show that its bothering them but when rescued by the other heros or villans, specifically after the whumper character isn't at the place they end up crying and breaking down about what happened when the others asked what happened to them or why everything on their body was torn. (non-human)
if the other comes back and finds their gone they send another one to go search for them that was also under that torture before breaking, they end up telling the group when their what happened and it backfires on the whumper entirely.