I get my slave all tied up with a rope around his whole body and his ankles cuffed to the chair legs!

This gives me full access to damage his genitalia as much as I want. I punch squeeze and slap his nuts so many times lol! His nuts are swollen red and damaged by the end of my fun. He begs me to stop eventually so I punch him really hard in the nuts one more time and leave him tied up for the rest of the day, unable to tend to his tender testicles :)