Mistress BlackDiamoond needed to pass a message and to degrade this loser. She felt that the best way for her to do that was to use her shit. That is why she chose to do it and that is why she had to see the punishment through. She had to make sure that the guy never forgot what she did to him as well as what she was capable of doing.
Mistress BlackDiamoond led her friends in shitting on this guy because he had refused to adhere to their strict instructions. He had only himself to blame for what befell him since they had warned him of the consequences of failing to do what they wanted him to do. He calmly took the punishment handed out to him even though it was cruel. He ate the shit in silence until he finished it.
Mistress BlackDiamoond is very protective over her friends and he does not like anyone messing with them. This guy messed with her friend and she had to torture him. The mistress made sure that the loser learned his lesson and did it in the presence of her friend. She took a shit on him and forced him to eat it then asked her friend to do the same to him.
Mistress BlackDiamoond and her friends were concerned with how this bully acted and how he poisoned the atmosphere in their neighborhood. He had to be tamed and the mistresses did so using their femdom toilet fetish. He was shocked at how they had turned on him and he threatened to deal with them but they told him they would deal with him first. They took a shit on him and made him get scared of them and that is how he stopped being a bully.