Taking it away from just the adult members of the marriage, what about the kids?
Imagine being one of 20 kids with several mothers. How can you every really bond?
Imagine being a boy. The boys get cast out, mostly, except for a favored one or two who get to get married.
‘Taint natural. Joking aside, for the children, I think it is cruel.
It happens today - this is not something of the 19th century
Survival of the fittest; my dear.