Mercedes needs to make sure her new slave will be useful or otherwise she would send him away. He has to pass some regular tests. First he is introduced to walk like a dog since every slave has to walk on all fourth. After that she makes him smell and worship her ass and here is the first problem. He isn't really good in licking her ass! So she makes him lie down so she can easily sit on his face to teach him what it means to be her slave.