Mistress Anna liked the fact that her slave was obedient. She had never really pushed him to the limit so she tried to do so in order to see what his reaction would be. She wanted to know her slave well and that was her motivation. She asked her slave to eat her shit and swallow it and the slave did it. She was impressed with the slave and gave him a raise.
A toilet slave is only existing to suck and swallow, every time his mistress sits on her toilet chair above his face and shits her turds out of her intestines. No one's interested in his useless cock, but he knows, that he's gonna receive a punishment for bad work, that's far beyond his pain barrier. He's the only one that is interested in his cock, and so he defends it from punishment by chewing and swallowing every piece of shit. A good toilet slave can avoid punishment. Maybe.
Living toilets always need a special training and I don't mind if I have to be rude to make them understand their position in this game. Their position is always unter my feet or my ass. And my slave has to chew and eat all of my shit, no matter if he's disgusted or in love with my turds. I want him to accept every little piece of the foul shit and clean up my sweet asshole afterwards, and he does. Naturally.