Mistress BlackDiamoond wanted to make sure this guy knew who he was dealing with. She made him suck her strapon and she even deepthroated him. She gagged him with it and then she fucked him in the ass with it. She did all this while she was smoking and enjoying herself while torturing him. She spoke to him through the pain and he knew never to mess with her again.
Lady Vampira wanted to send her slave to enemy territory and she knew that he would be tortured. So she tortured him first to make sure he would deal with anything they sent his way. She fucked him in the ass with a strapon and he felt the kind of pain he had only heard about up until then. But it helped him know how to deal with pain when she finally sent him.