It's great to hear that your relationship has helped you gain confidence ID- that can & should be a big part of any D/s relationship. A good way to get in touch with yourself in a lot of ways.

As far as what you can do, there's a million variations on the theme of teasing like that. You could start playing with yourself, then tell him off for looking & blindfold him. I'm sensing some opportunity for humiliation here.

Male subs often like to be called a bad boy etc. When I was that way inclined, I had a friend who'd get together with another girl & ring me at work.

It was quite hot, listening to them both telling me what they had planned for me, while my boss was in the office...

There's also the old tried & true collar & lead- lie or sit down & instruct him how & where to please you with his tongue, whilst pulling on the lead & flicking a crop or whatever.

I could go on....