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
Clever chastity device is hitting cock with electric discharges while topless girl is sitting on top and using vibrator
Slim dominatrix is playing with slave's balls: putting them in extreme rope bondage and attaching massive weights
Test subject is feeling pain when cruel brunette is sing steel tous and electricity on his exposed penis