Madame Madison wanted to show her slave what a worthless piece of shit he was. She decided to make him lick the dirty soles of her shoes. So she went outside and walked on a dirty path then came home and made her slave lick her boots clean. He had to start from the soles and work his way up. And she timed him to make sure he did not take longer than necessary.
Mistress Gaia does not care what happens to a slave whens he is humiliating him. He can literally choke and she could not care less. He can cry but his cries of pain are music to her ears. Today she made her slave lick the soles of her shoes as she held a whip to whip him with in case he did not do what she wanted. So the slave was careful to please her in order to avoid being whipped.