Well, straights deserve marriage because only straights have the potential of procreation. Youll need some other justification for extending marriage to gays, while still witholding it from the single mother and grandmother down the street who have been raising a family for years. Because the fact that they dont rub genitals has no rational relation to serving the stated governmental purpose of formation of stable households. And still
§ 160.204. PRESUMPTION OF PATERNITY.
(a) A man is presumed to be the father of a child if:
(1) he is married to the mother of the child and the child is born during the marriage;....
Only applies in the case of a heterosexual couple.