The chastity belt is some kind of remote for the Mistress. Slaves are controlled by their desires or to say it different they are victims of their cocks. Some slaves are very interested in worshipping their Mistress and doing anything she wants or demands, and other slaves just do so if they are teased. After having an orgasm the world looks often very different and paid tributes make the slave feel bad. To avoid stress like that, the Mistresses often use chastity belts. Knowing that the slaves are acting much better when they are horny, they force them to stay that way! The interesting part ist that the slaves also want to be kept in chastity even if that means an end to their orgasms. When the cage is locked up, there is no way to cum anymore. The slaves are just puppets from that point then.