Wasn't Eve made for Adam by God? Doesn't get more sacramental than that.
Point is, that "marriage" is a word that has historically held meaning well beyond "sexual coupling" or "domestic partner". What we currently have is an attempt to redefine the word to mean nothing more than those two things.
Control of the words meaning is probably not controllable in the face of a Leftist media; however, the religious shouldn't accept that meaning, even if it means adding an adjective, such as Holy or Sacramental. This can be reinforced by rejecting the state's authority over marriage altogether.
Perhaps you’re using the word sacrament in a way other than its usual sense. Beyond that, we’re quite in agreement.
Yes, the first wedding ceremony took place in Eden, and marriage was established and defined by God creating the woman for the man and bringing her to him. There is no other definition of marriage, nor can there be.
As you say, the word “marriage” itself may be twisted and misused to refer to other couplings. But marriage is what it always was: the joining by God of a man and woman. The state has no authority here. It will have just as much success legislating that the sun rise in the west and set in the east as it will legislating that two people of the same sex can be married. “Unisex marriage” is self-contradictory.
As the punch line to old joke says, calling a tail a leg doesn’t make it one. :-)