Must there be exactly two persons in a marriage?
Must they be over a certain age?
Must they be a certain genetic "distance" apart? (i.e., can they be brother and sister? Mother and son? First cousins? Second cousins?)
And can you perhaps summarize your basis for imposing these restrictions on marriage? In other words, why shouldn't the full legal status of marriage (even if we call it civil unions) be extended to any mutually consenting group of persons who wishes to acquire it?
Thanks.