I've address this topic before, but never to my satisfaction. I've never had a good answer, always thinking that people were incapable of doing it -- that if they had it in them to do it, they would have just done it. But one of my friends wanted to seduce someone they believe is sociopathic. And because I know her a little better and the nature of her strengths and weaknesses, I thought that maybe I had a better chance of coming up with something than I have before. And here's what I told her:
I've been thinking about the best tactic for you to seduce your maybe sociopath boss. I was thinking that sociopaths are intrigued when people they know change, like not just an off day sort of temporary change, but start acting differently pretty consistently. That should renew their interest in you, because they thought they had you pegged but you turn out to be more dynamic than they had considered. And I think they are also intrigued when people share their same traits, because they are, after all, narcissists. So I was thinking that maybe you could work on one particular trait that is similar to a sociopath and really make it a daily focus for the next few weeks and see how that works.
The thing that I think will be most helpful for you, and in a Karate Kid paint the fence sort of way improve your manipulation skills, is to focus on exploring every aspect of yourself. You know how sometimes they tell golfers to focus on what their pinky toe feels like in the moment that they start their swing? Always be thinking of yourself. When you talk to people, think of what your upper right prefrontal cortex must feel like. When you are eating, be aware of the size and shape of your tongue. Think about things you have not thought about yourself in years, if ever. Feel the bottom of your lungs, the roots in your teeth. Become aware of your eyes in their socket. When you shower, truly regard yourself in a frank fashion. You are a marvel, a wonder of engineering. You are a god. Your body is amazing and your brain is unfathomable. Explore the spectrum of your feelings. Can you think yourself to tears? To bliss? Explore every single inch of your physical, emotional, and mental self with the sort of curiosity that a walking miracle such as yourself deserves. And you control this thing. Let yourself become heady with the thought of your power over this awesome thing that is you.
This is the sort of self regard that sociopaths have about themselves. If you do this you will act differently, and he will notice. He will also recognize, and admire, that you two now share this trait.
I think this will at least renew his interest in you. Once that happens, maybe we think about you trying some more advanced things to get him to understand the nature of your desire.