With his cock caged, you can enjoy a quicky wherever and whenever.  Don't need to waste time taking clothes off once he learns to do this well.

You don't have to be exposed or in full dominatrix attire, but you can still make him submit to you in little ways... In full view of the neighborhood.

Best negotiating tactic...  Sit across the table with your shirt open.  Foot teasing his cock.

As a precursor to making him swallow...  This is so easy.

Have some humiliation shirts made up.  A fun creative exercise...  A lot of fun at the t-shirt shop seeing the shock as you place your order or pick it up. Then, where them around the house and nonchalantly want to go out to the store with him, run errands, or go to a friend's house. He will likely panic a bit asking if you could or would change.  Just slip a short over the top. That way, you can tease him more while you are out.  "It's getting hot in here...  I should take my outer shirt off"  or unbutton your shirt a bit, so some of the phrase is exposed.  

Any boundary can be overcome.  Just give it time and teasing, and soon he will BEG you to cross that boundary!

Ladies... If you are still on the fence about femdom, just take the plunge.  It is so easy, and so rewarding!

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.