Male is handcuffed and having a weight attached to his balls: whipped by girl in the sound-proof chamber
Guy got his cock in the glory hole but girl bondaged it with thin wire instead of giving up a blowjob
Mistress is using balls destruction as a way to stop that man from jerking off: spread-eagle bondage, balls beating and trampling are doing the job fine
Dominatrix is wearing rubber gloves and dealing with slave's ball sack by using a set of medical clamps
It is impossible for the frog-tied slave to runaway from the whipping mistress punishing him violently