When I was growing up in the suburbs, everyone's dog wore a collar, all the time. Now that I live in Chicago, it seems that 60% of the people I know with dogs take off their collars when they enter the house.
Just curious, does your dog always wear his collar?
Gatsby walks with a gentle leader harness which of course gets taken off once we're in the house. However, he has a cloth neck-collar on at all times.