Over a decade ago I began writing a story (am still writing it -- it's a soap opera and as such never ends) in which the dominant male has a girl Friday who legally changed her name to Pooh Bear and whom he referred to as, "Pookie, my security blanket."

Same damn thing happened when I wrote a Star Trek themed story set on Planet Bob and then there was a movie a couple of years ago which ends with the hero naming a newly created planet Bob (apparently everyone else wanted to name in New Earth -- now THAT'S original!).

Subs are no more original than doms in coming up with names. I had an on-line sub who I met through the Library who called me My Sir and wanted me to call her Little Girl (in Deutsch).