I searched this morning for communities related to polyamory and open relationships. Finding nothing, I created something. If you are interested in polyamory, open relationships, ethical non-monogamy, etc, swing on by for a chat, to post something silly, as you will.
edit: !polyamory@kbin.run
On average, there would be slightly less than two extra hands per person added.
The average person has approximately one boob and one testicle