Mistress Van Licks had a new slave and she felt that the new slave needed to be punished. She did so and ensured that the guy felt not just pain, but that he was also degraded and humiliated by all that she did to him. She was not forgiving to him and that is why she was as cruel as she needed to be to him. He never messed with her as he knew what she was capable of.
Goddess Gabriella was out to scare this loser and she wanted to do it with her spit. She chose to use her spit fetish to degrade as well as humiliate him because of how humiliating she was sure it was all going to be. That is why she did what she had to do and why she had to teach him never to piss her off. He learned his lesson.
Miss Sabrina ordered her foot slave to massage her nylon feet - but he isn't doing it good and so she punishes him by spitting into his mouth and all over his face. Over and over again she spits into his mouth and orders him to swallow her spit while she throws random verbal humiliations at him. He's to take the punishment and it'll teach him to be a better foot slave in the future.