generally bad mormons used to be able to pull it off if you ignore the lost boys. i have never seen polyamory work even with reddit tier men they are both seething internally about it or the other guy doesnt give a shit about her. polygamy almost never works either with the exception of a weird dynamic where one woman takes the lead or its like a older sister dynamic which is very strange i know one couple pulling it off they have three kids now but the non lead woman got pregnant first.  overall both are a bad ideas i dont think jealously can be easily dealt with even siblings or the best of friends cannot share somethings.
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