Which was my main point. From the children perspective, do they need more than 2 legal parents? Regardless of what the parents like for sexual partners, the children’s needs are quite different. This is why this is illegal. They don’t, from a legal standpoint.
For example. If 3 people marry and divorce: who gets custody? How much money do you have to pay divorced partners (ALL of them) (and NO, you can’t divide the amount among the partners, each need to have the full amount!)? If someone dies, who gets inheritance?
How to share legal responsibilities as “parents” beyond more than 2 genetic parents is a legal nightmare, no matter how you look at it. It’s not about the rights of the parents, but the rights of the children. They deserve to not get involved in that mess.
THIS is the marriage institution - not the “fun” parts.
But, all consenting adult parties can agree to a legal agreement. Meaning, it is possible to make a custom made marriage agreement. But, you may not diminish the rights of the children regardless, legally speaking.
