A little ballbusting never hurt anyone... Just kidding! I've already put my slave through a lot, as his body is covered in marks... Let's warm up with some twisting, then move to kneeing, then good old kicking. I occasionally stop to stroke his dick to ensure he stays hard before slapping some more. By the time I'm done with the slave, I've kicked him over 50 times not including knees and slaps. Could you handle this?