Goddess Nika has well toned muscles and she is a strong mistress. She flexed her muscles to scare the shit out of her slave and she used that fear to dominate him. She dominated him using her armpits. They were sweaty for a purpose. She got him to lick her sweaty armpits and to dominate him as cruelly as she wanted. He had never been as degraded as he was that day.
Mistress BlackDiamoond and her friends worked these guys hard and got them to sweat. And the mistresses waited until they were sweaty and tired to dominate them. The mistresses forced them to make out even though they were straight and they also had them lick each other's sweaty armpits. It was fun for the mistresses to watch but it was torture for the losers as they could not believe what was being done to them.
Mistress Caroline did not like how this guy had poor listening skills. She did not want to talk to someone who did not listen because it meant she was wasting her time. The mistress had to punish the guy and she did it with her armpits. She made them sweaty before she asked him to lick them. It was cruel and degrading but it was what he needed to learn a lesson.