I remain baffled at those who quote scripture as if it was done on a typewriter. Marriage is a legal framework, there is no other way, and it is done as such for protection by the laws of the state where the marriage was conducted. My marriage cost $20 and has lasted 45 years. My in laws hated me until I helped produce children and they still hated me, but love my children which look exactly like me. Only law protected my wife and children from my in laws. God facilitated unions and man gave those unions protections under marriage laws.