Mistress Rosella and her friend wanted to get a slave and enjoy the piss fetish with him. But before they could go through all the trouble of finding one, they decided to try it among themselves so as to know whether it was worth it. They were amateurs and had not done it before. So they took turns to pee into each other's mouth and when they were done, they had had some much fun that they found it worthwhile to get a slave.