

This exactly. It’s an easily recognizable legal shortcut to a bunch of systems, rules and privileges that apply to the situation of two people wanting to live their lives together. Doesn’t have to cost much, if anything, and doesn’t have to have anything at all to do with religion or rituals. Can be just two people showing up at the town hall if you want it to be.
Sure they do, all the time, as long as it’s an interesting story.
More than half of the books on this list are by “random” ie, non famous people.