What? Your "(a) living together" is a much more serious and well established relationship than "planning wedding". "living together" implies a de-facto relati

What? Your "(a) living together" is a much more serious and well established relationship than "planning wedding". "living together" implies a de-facto relationship with the legal protections that brings. "Planning a wedding" gives none of that. To your point: legal protection is a very serious "social resource" given potential offspring a benefit.