I think many of my stories belong here
"You're lucky Joanne, a part is still attached, have your way with it". She bent over and grabbed the disk of nut that was left. I heard a muffled vowel or two coming from the slave in protest, but when Joanne's fist hit his nut, nothing was to be heard anymore except the sound of the impact. She punched and punched, and his body made short convulsions at every impact and sometimes randomly. After a minute or two there was practically just a chord left where the testicle once was attached to. Joanne with blood all over her hands got up and walked away. "Make sure breakfast is ready at 9AM", she demanded, and left him there.
This is a snippet of the full story. Read the full thing on my Wordpress