The Government (USA) lets you live with anyone you want. What goes on in your house may or may not be marriage according to the way you live. Look at what the government says in court cases. The say "consenting adults." In other words, you can live like you were married as long as you consent.
But try to get a marriage license for all of your wives, and the Government won't let you... if they realize what you are doing. Why is there a difference?
Let me make this as clear as I can. Imagine that you get a marriage license. It has your name and her name on it. Is your name you? No! It is a person of the marriage. It is a fake person. That piece of paper isn't a man or woman. It's a stupid piece of paper. Your marriage to the woman isn't the paper.
The thing that the Government won't let you do is have the same fake person - the same kind of piece of paper - marrying more than one other fake person. The paper isn't you, even though it has your name on it. It is simply one of your PERSONS, because you signed the paper, making it yours.
Now if you identify each of the many persons you have, all as separate persons... your employment contract person, this bank account person, that bank account person, the car loan person... if you identify them separately in some way, then there will not be any mix up. So, you get the marriage license for this person that bears your name, but you identify him/it with a number along with your name, and you acknowledge that this person is different than all the other persons that you have (and she does the same), then it is not you and she, getting married. Rather, it is your person and her person.
After all, you can go out and co-habit as much as you want. It is allowed as long as it is by mutual consent. Look at all the court cases that say that sex outside of marriage is allowed as long as the parties are consenting adults. So, co-habit by making the marriage between the two of you, and don't fill out a marriage certificate for yourself and her.
Look at the 4th Amendment: "The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."
Note the part that says, "... people to be secure in
their persons, houses, papers ..." Notice the word "persons." Notice that it is plural. Every time you fill out your name on a piece of paper, you are creating a new person, except when you are naming an already created person of yours an additional time.
Wake up. You aren't the persons that you create, and they aren't you. They even aren't each other.
For example. You have a Social Security number that you control. But who or what really has that SSN? It's a fake person... the person listed on the SS card. That card isn't you. That card is a piece of paper. You are flesh and blood. Later, when you fill out a job application, and apply "your" SSN to it, what you have really done is created a new, separate person, and authorized it to use the SSN of the SS card person.
Apply this thinking to marriage, and realize that you can marry or not, any which way you like, and the paperwork of the marriage license is not you. It is only a person of paperwork. You and she are flesh and blood. In fact, you and all the shes are flesh and blood, and are under voluntary consent to be together. Your marriage is private. Government can't interfere until you make it a public thing by filling out the marriage license, and stating that the names on the marriage license are you and her.