" GG added you back on Google+" April 14, 2014 One year!* And
   yes, you are correct.* If you added me back, that means I added
   you first. :P What likely happened: You probably commented on
   someone's post [perhaps in a community - probably Minecraft - or
   might have been a friend we have in common - I'm thinking Matt
   Cowen but I'm not sure now] - and I thought, "this guy's cool -
   intelligent - I want to hear more what he has to say about
   stuff."* Add to Circles.* Done. That's usually what gets me to
   add people; I can spot creativity/intelligence in a few words
   someone writes and ask myself, "More? Y/N".* If Y, then "Add to
   Circles".* If N, then I don't. I don't know the particular post,
   although looking back at email archives, the posting after that
   was a 3D view of a city in France.