Well, I suppose the first thing is you should talk to him and tell him what excites you. If he knows your interests and you’re comfortable talking it over with him, that makes it a lot easier.

If you have a specific fantasy, you could just be honest, and ask him to role-play it with you. Everybody played cops and robbers or something when they were young. I mean, I guess depending on your age it might sound weird to say, "Hey, how about we pretend I'm the maid and you caught me in the forbidden wing of your castle..." but that's really the only way he'll know what to do.

If you just want him to be generally dominant, but he’s shy about making demands, you could start by showing him a basic idea – tell him you want to take care of him, lie him down, and then make him feel really good. Some men who are excessively gentleman-ish feel like they’re imposing if they so much as ask for a blowjob, so that might help make it clear that you *want* him to demand satisfaction. Once he gets it through his head that it’s not selfishness or rudeness, he might be more ready to do what you’re hoping. Again, explaining it is key.

Of course, that's just my opinion. There are plenty of people here with more experience who might have better ideas. Good luck!

:o)