How about myth #6: The requirement that a marriage contain exactly one husband is a "religious" requirement, and its imposition would thus be a "state religion". The reality is that every human society which has ever achieved any degree of success has recognized the concept of a marriage between a female and exactly one male.
THIS WAS TRUE BEFORE ORGANIZED GOVERNMENTS OR RELIGIONS EVEN EXISTED. Different societies have varied greatly in how marriages were entered into, recognized, dissolved, etc., as well as what restrictions were placed on the participants. The one thing on which there is essentially no variation is the number of males required for a marriage: one.
There is no way one can honestly say that a male-female relationship which would have been recognized in almost every society throughout history is the same as a male-male or female-female relationship which would hardly have been recognized in any. The difference is not a result of governmental or religious edict. It is far more fundamental, and no government edict can change it.