Lady Karame and her friend wanted this guy to learn his lesson and he had no choice but to do it as they made it clear to him that if he did not do what they asked him to do, he would have himself to blame. They told him that he would be crushed on the nuts and he did not want to experience such a thing. So he cooperated with them and licked their dirty feet.
Lady Karame and her friend wanted to dominate this guy not because he had done anything to warrant being humiliated and dominated, but purely because he was a loser. They did not want any losers near them and when they noticed one getting close to them, they would dominate and humiliate him to either stop being a loser or to stop associating with them. This one chose to stop being a loser after he had been dominated.