Lady Larissa could not believe that her slave had forgotten everything she had told him. She was pissed at her forgetful slave and she wanted to give him an incentive to remember things. He had to do something about his forgetfulness and she used her pee to do it. She turned the slave into her human toilet and had him drink her piss. He was degraded and humiliated but it helped her try as much as he could to remember things in order to avoid being humiliated.