That's not a bad idea at all.

[He likes the sound of it. Easy, clean, obvious borders around scenes that aren't tied to places, or even behaviour, necessarily.]

We could go shopping together for that, [he suggests.] That way, we could try things on you. See what you like or don't like, if the combination works for you. I'd love the idea of a collar on you. [Preferably a broad one, covering as much skin as possible, too. It'd make some things easier on him.]

And I'm sure I can figure something out. I'm quite ingenious when it comes to finding solutions for unusual predicaments.