To upkeep ANTIjealousy also from my Ladies (meaning that my Ladies are even inviting new Ladies including into intimate relationship with me) I was and I am using 5 +1 (!) Languages of love: https://dmdu.kvalitne.cz/pet-jazyku-lasky-vztahu - Google translator and translatable chat UI are included there too. Playing together (even comparativey) fits into the love langiage called "quality time". Your jam is indeed interesting for us!:)
We nearly still have hard time explaining that we are not cheaters nor having "open relationships" in the wrongly understood sense. For example, if I woud want a new Lady in one of my harems (I have more of them because of locations...), I would need an aproval from my Lady Partner. Your picture showing the variants of polyamory is so super!:) Would you be please so kind and allow us to using it? Although it looks, that we have kind of specific hierarchial polyamory - my Lady partner as a Queen and not "just" a priority Partner. Uff, excuse me please for pouring out my hearth. ;)
As you can see, I am able to protect my Ladies too. Fun fact: In this time I need kind of protecting myself against too much *interest* of women. The Law of Attraction apparently works for me in a manner of a snowball rolled down from the top of snowy mountain.