I am currently listening to the Eragon audiobooks (I read the books years ago) and I don't think, Paolini was aware of the limitless potential, when he described the elves. They don't marry, they just take mates, sometimes for a day, sometimes for a century. Also, through their magical abilities, they can shape their bodies to any form they desire. Some of them even change, to look more like animals.
So here's my take (and hear me out on this): Polyamorous transgender furry elves!







