Princess Serena is blessed with a hot ass and she wanted to make it useful for something other than using it to sit on. So she looked up what she could do with it and she settled on using it for hypnosis. That way it would make her get some money for herself. It worked as she was able to hypnotize a lot of guys since her ass was super hot and they could not resist it. Then she would turn those guys into her human atms.