Princess Maywa and her friend were not pleased with their new hire. He was indecisive and they wanted to make sure he learned to stop it and to take firm stands. He was turned into a scat slave and had to eat shit for him to learn his lesson. It worked out the way the mistresses wanted it to and that is how things changed for the better for them.
The main reason why this mistress chose to shit on this guy was to make sure that he learned his lesson and that he did things the way she wanted. That is why she chose to make sure that he was scared shitless. To make sure it worked out, the mistress chose to shit on him and have him lick her asshole clean when he was done eating it. He was scared and always did what she wanted.