Mistress Atrax and her friend wanted to test their new punishment method. They wanted to make their slave not only to lick their dirty shoes, but to also crush his balls. They wanted to test it and if it was effective, they would use it on all slaves. They made the slave bend over after tying him up to minimize resistance. Then they kicked him in the nuts. They turned him over and crushed his nuts before trampling his cock with their heels.