Lady Stefanie did not like how forgetful her slave was and she wanted to show him it was not ok with her. The mistress used her socks to pass the message. He had to learn that she was not the kind of person to tolerate such a thing. So the mistress made him lick her socks and she promised to trample him and to choke him if he did not change.
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 Karla wanted to dominate her slave to pass time as she had watched all the movies she could find and had nothing else interesting to watch. The mistress summoned her slave and she forced him to lick her boots especially the sole. When he was done, he was about to walk away when she called him back and had him lick her socks as well. They were smelly but he had to do it.
This mistress had a new slave and she wanted to instruct him and to find out how well he took instructions. So she asked him to lick her stinky socks. She was also checking for his obedience. She then gave him instructions on how she wanted her socks licked and she was glad he did everything her way so she did not need to torture or punish him any further.