I don't know of a state that does allow a civil marriage to a non-human.<quoted text>
Most States do not allow bequests to non-humans.
That wasn't the point. You essentially stated of non-consensual marriage "How will the cow or car demonstrate Informed Consent to the contract?"
Good question. Especially since states allow non-consensual wills to be left to animals without that animal being able to accept that will or to reject it. Wills to humans have to be okayed by the human recieving the will. That's law. They have to sign a legal document consenting to the accepting of the will. But state laws allow for an animal to be forced to accept the will. So what would be the difference if states passed laws that forced animals/things into marriages without their consent? States are already forcing them to accept wills against their consent. What, breaking the law of consent on one end is okay but from the other direction it isn't okay? Very hypocritical.
And as I said that you side stepped, non-consensual human arranged marriages take place all over this world without any intent to harm either bride or groom in the prearranged marriage. The bride and groom are usually okay with the prearranged marriage in many cases.
So non-consent of marriages is alive and well on earth.