Madame Marissa knows that her slave has poor dietary habits. She tried to make him eat right and drink lots of water but he could not do it. So she took it upon herself to make him do it. She decided to start with water first. She made him drink her spit if he did not drink water. After a week, she had him drinking water like he was supposed to. That was motivation enough.
Lady Nicole wanted to break up with her boyfriend but she did not want the guilt that comes with breaking up with someone. So she wanted him to break up with her and she did not know how. She asked her friends and they told her to humiliate him. She used a flimsy excuse and made him lick and swallow her spit as she humiliated him and degraded him. After they were done, he broke up with her.