Goddess Wu does not like people who misbehave and this guy was one of them. He was too playful and he ended up messing with people and even misbehaving. He misbehaved and pissed her off and as punishment, she made him drink her urine as well as eat her shit. That is what made him learn never to mess with her again as he knew what would happen if he did.
Mistress Fan felt that her assistant was messing with her and she did not like it. When she asked him to stop, he did not and she did not like it. She felt that she had to do something to put it all to rest. So she used her shit to achieve all that as it was degrading and it made the assistant pay attention to all that she said.
Goddess Zhou does not like snitches. He feels they are weaklings and they do not deserve to be anywhere near her. This guy snitched on her and she had to give him a reason never to do it again. She roughed him up and she got him to eat her shit and told him that if he ever snitched on her or anyone else again, he would have himself to blame.