Lady Nora and mistress Kim Judge needed to seal a deal with this guy, but he was non-committal, and that pissed them off. They had to come up with a way to dominate him to show him how serious they were. That is why they chose to teach him a lesson and to degrade him with their saliva. They made him drink and lick their saliva, and it was humiliating, but he agreed to seal the deal.