LOL. Not quite.
I am not comparing the sameness of Partner A to Partner B. I am comparing the sameness of Partner A's eligible choices - the sameness of all his/her prospective Partner B's, if you will.
I am claiming that, if a black man can marry a black woman, there is no reason why he shouldn't be allowed to marry a white woman, because there is no innate difference between a white woman and the black woman. His two choices of marriage partner are equal, or "interchangeable", if you will.
It does not follow, however, that if a man can marry a woman, he should be allowed to marry a man. It would be intellectually dishonest to say, "Marry a woman, marry a man, it's the same thing."
