I have used the three collar ideology before, and still do. Each step of the collar is a step in the relationship. Collar of consideration=Dating, Training Collar=Engagement Ring, Permanent Collar=Wedding Ring. With that in mind. I don't wear jewelry, so me wearing an opposing piece is out of the question. I do agree with Oz as well, that the Ds part of this isn't equal. It's an exchange of power, not worth.