Mistress Anni needed to punish this guy for being mindless. She did not like how he acted and what he did. So she had to teach him how she wanted him to act. That is why she used her kinky foot worship fetish to deal with him. He was in pain and he regretted the things he did. He was humiliated as he was forced to lick her smelly feet and her stinky socks.
Mistress Diana felt that this loser needed to do things that she told him and not things that he told himself. She had told him politely about it but he did not do it. She had to ensure he did what she asked so she got him to lick her bare feet which she had made sure were smelly and sweaty. All that time, she was chatting on her phone.
Mistress Samantha orders her wimpy slave over to take care off her beloved UGG boots. He has to lick the filthy sole of the boots clean for starters. But Samantha wants more - she makes him smell the stinky inside of these worn out boots and afterwards he also has to smell her stinky socks and worship her sweaty bare feet.