In life it's better to accept everyone's nature. Polyandry? Me I prefer polyandry being the two men accepting each other for her is a better option vs the caveman mentality of her being property of the caveman male like dragging her by her hair with a club. In that no one wants to be ones slave in life.
Balance is balance for all. If not then it is unbalanced and does not work. Note for all, you can love more that one! In that is better than not! "Better to Have Loved and Lost than Never to Have Loved at All." Is life but more in Polyamory "No man is a island." a point of a making a better place for all because life happens!