Lady Karame tried to mess with this guy and he fell for her trick. She then used that fact to humiliate him. She got him to lick her boots after finding an excuse to humiliate him. She had muddy boots which she wanted licked clean and that was his job. He did it as he was afraid of her. When he was done, he ran away without looking behind lest he was humiliated again.
Madame Marissa was mad at her co worker for starting rumors about her. She knew where to find her so she went to where he was with muddy boots and she punished him for the rumors. She forced him to lick the mud off her boots and told him that was the easiest punishment. She had other things up her sleeve in case he refused to apologize and to stop the rumors.
Mistress Lydie loves to get nasty with her domination of her slave. She walks outdoors through messy mud and gets her nice white high heel boots filthy then orders her loser slave footboy to lick off every bit of the mud. He is humiliated and gets a mouthful of mud, but that's the price he pays for getting the privilege of being Mistress Lydie's footboy. She likes her domination filthy.
When Mistress Lea goes out for her daily walk, she makes sure she has on a comfortable pair of shoes. She didn't realize she would get her shoes muddy along a walk of the river. She won't allow her shoes to remain muddy long. She calls her slave to her and orders him to lick the mud off her shoe. She loves watching his turn become a scrubber as he cleans her shoes.
Mistress Kitty is so cruel! She takes her slave out to the woods and digs her high heeled boots in a pile a mud. Then she sticks her boot in her slave's face and commands that he licks them clean! This pathetic slave eats mouthfuls of dirt off of her boots! After he is done eating the mud, she gives him some dessert. Her spit! She shoots her saliva directly into his mouth and makes him swallow it!