Though when people are immortal superbeings, I also expect it to become common that they'll spend a very long time if necessary searching for an instance of fairytale monogamy to be their first relationship.

I volunteer to be the evil villain who goes about poisoning damsels and locking them up in towers so that they role play rescues by knights in shining armor. I'll turn a few guys into beasts too in case they are feeling left out.