That's kind of a problem. He wouldn't like me as his slave. He is more vanilla (I've broken him of a lot of it), but even when he dominates me it's not for long (just a playing session), and even then he doesn't treat me like a slave. He just has some control of me, etc.

I know he is fascinated by mind control, but I've only read some stories about it, so I'm not sure how to approach it.