Neither the law of Moses, nor any other law made by man, will never overturn the “one flesh” marriage law that God established in the garden.
“So the man gave names to all the livestock, the birds in the sky and all the wild animals. But for Adam no suitable helper was found. So the LORD God caused the man to fall into a deep sleep; and while he was sleeping, he took one of the man’s ribs and then closed up the place with flesh. hen the LORD God made a woman from the rib he had taken out of the man, and he brought her to the man. The man said, “This is now bone of my bones and flesh of my flesh; she shall be called ‘woman,’ for she was taken out of man.” That is why a man leaves his father and mother and is united to his wife, and they become one flesh. ” Genesis 2:20-24 KJV
“The disciples said to him, “If this is the situation between a husband and wife, it is better not to marry. Jesus replied, “Not everyone can accept this word, but only those to whom it has been given. For there are eunuchs who were born that way, and there are eunuchs who have been made eunuchs by others–and there are those who choose to live like eunuchs for the sake of the kingdom of heaven. The one who can accept this should accept it.” Matthew 19:11-12 NIV