Women...  Use his internet history to know what turns him on, and look for ideas. Men...  Let her review your history.  You're looking at what turns you on, so don't be a wimp by trying to hide it.

this is a great caption to teach you both how to think.

You can suck on a cock in his mouth to make him hard in his cage, while ridding his strap on making him feel like he's having sex.

Test his submissive resolve.  Don't just give it to him...  Make him BEG to suck your strap on, or BEG to have you own him

Clothed or unclothed, spend some time with him underfoot.  It conveys SO much!

A simple choice like this can serve as a challenge to assess where his allegiance is...  You or himself.  If he chooses wrong, you could Take his choice away.

Go shopping with him.  Make him carry your purse...  The more feminine the better.  It will free your hands and subtly publicly display his submission

The trick is making sure he seeing edging as the greater reward than release.  That takes mental training and preparation.

Sometimes simple black lingerie and a crop are all you need to rekindle submissive longing in him

Ask this question, more to remind him that he is locked up under submission to you.