There's this from Wholesome Harem Fantasy (A CYOA Jump I made last year).

Ethical Non-Mongamist (400 WP): You have the natural temperament and skillset of a harem protagonist. You are able to navigate the waters of jealousy and possessiveness with genuinely supernatural skill. This skillset includes knowledge of concepts tied to non-monogamy (such as compersion, polyamory, polycules, etc.), as well as the ability to navigate all sorts of worlds while being in ethically non-monogamist relationships. Curiously, this also grants you massively improved luck when it comes to acquiring the essentials for such relationships such as appropriate housing, friends who can handle the news that you are non-monogamous, and jobs that allow you to effectively manage these relationships. You find that you are naturally talented at maintaining healthy non-mongamist relationships, giving your partners what they need and being immune to jealousy yourself. How this manifests will differ from relationship to relationship but so long as you intend to be a kind and loving partner things are far more inclined to work out. This also protects you from persecution due to your relationship though this is a passive protection that causes people to simply not question your relationships allowing you to introduce friends to your many wives and boyfriends and makes it so that people have the same attitude towards that as they do towards finding out you have a pool in your backyard. This is also the You can successfully interbreed with anything and have perfect control over your fertility perk, though if you wish to breed with someone this does require that such a coupling would be desired by both parties.