Mistress Karina does not like this loser. And she wanted to show him just how much she did. The mistress tricked the loser to go to her house and when he did, she used that chance to dominate him and show him how she truly felt about him. The mistress did this by forcing him to swallow her spit. He was degraded but he became smart and did what she asked so as not to suffer more by angering her and making her do more cruel things to him.