To me collars are important for more than play.; It is a symbol of my ownership of the submissve/slave it is a public display much like a wedding ring to tohers that this one is mine hands off with out permission. It also reminds them of the bond and commitment that we have. While it is not completely neccessary for a collar if you have given your word to committ to another that in and of itslef should be enough. The collar for many submissives seems to help intensify theri feelings and for the dominant also intensifies the feeling of ownership and control.
It is important to ind a collar suitable for your public lifestyle. Carter Stevens had one on the market that while it was leather looked like a hugh end choker. Also J.D.'s Stockroom seels a nice assortment of dress collars and anklets. Several of which are fastened with set screws. this allows you to get the feeling of ebing locked in without an obvious lock.

With my wife (she is also my submissive) I collared her initially in private about 3 years ago. We will be doing a formal recoallring recommitment ceremoney this fall. For that her permant one and only caollar I am having a friend who works with metal custom make. This way she gets a collar that can be worn all the time whether it be to work or with fmaily and friends. I get a collar she finally can wear all the time to symbolize my love, control, and care for her.

Hope my 2 cents does not add to the confusion.......