Collars, whats all this about then? Physical/Symbolic theory

So this is an interesting topic, at least to me.  Anyway I'm going to define my terms up front.  This is likely to be the last bout of theory for a good while as I'll start to work through my backlog of posting links.

Symbolic-collar or Collar (capital C): a general term for a token used to acknowledge a power exchange.  Collar may also refer to the exchange relationship itself.

Physical-collar collar (lowercase C): An object that closes or wraps around the neck.  A physical item worn by a person.

Collared: A person may be said to be "collared" when they wear, or experience, a Collar.  Being part of a power exchange relationship, no matter how small scale, subtle or individual.