Who gets the armrest?

Recently I came across a travel blog with a spirited discussion taking place on arm rests on airplanes, and who gets them. Someone even claimed there is an unspoken rule that the person in the middle seat gets both. I have never heard of such a thing, and I’ve spent the last four years learning pretty much everything there is to know about air travel.

I had no idea this was such a hot topic. This is definitely an oversight that will be sure to make the next edition of Please Hug Me–I’ve Been D...