The Volokh Conspiracy - -: "Blankenhorn and the purposes of marriage:
In addition to the important procreative and child-raising purpose of marriage that David Blankenhorn and others opposed to gay marriage have emphasized, marriage has other functions arising from our history, tradition, and actual practice that are served by allowing people to marry even if they never have children.
So what does marriage do? What is it for? Marriage does at least six important things. I put these here in block text for ease of reference:"