Madame Marissa wanted to impart knowledge to her slave but he was not receptive to it. She had to find a new way to do it so she did a little research and she settled on sniff my socks as the best way to punish him. She got the loser to lick her socks and she dominated him with it. She used it to instruct him and teach him how she wanted things done.
Mistress Gaia wanted a human toy to play with and she turned her slave into one. The mistress wanted him to lick her feet, sniff her stinky socks, lick her pussy and her ass, endure trampling and ass sitting and he did all of that as she did not give him an option. He had never been as humiliated as he was today by the mistress. But he endured it all.