@kelbesque it took forever to figure out, especially because my demisexuality led me to stumble into every relationship i've had on accident
it wasn't until my partner and i independently developed crushes on the same person and started talking about it that I even started exploring the idea.
i had a mentor who used to work as a university crisis counselor who was a font of knowledge on history of non-monogamy, which i was grateful for.
so, talking it out, is basically how i figured it out.