Girl is into pain and electricity: finding out how many volts male slave can handle in his wired penis without passing out
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
Guy got his cock in the glory hole but girl bondaged it with thin wire instead of giving up a blowjob
Hot dominatrix is having her slave handcuffed and using weird tool to pu tight rubber bands over his balls
Slim dominatrix is playing with slave's balls: putting them in extreme rope bondage and attaching massive weights