Honest question: how does one read something like this? Take the time to research each obscure reference in each paragraph? I found it to be quite impenetrable, and boring.
I disagree strongly that homosexual couples are recent "invention" given that it is so easy to hypothesize how it could occur as a evolutionary response, and that it occurs in as many as 1500 species[1].
Well, the author was talking about happy couples in that list. In my interpretation it says that there were no happy, gay couples before our time. That is both wrong and ignorant. The author was too busy minding his obtuse style to pay attention to meaning I'd say.
By matching the author implies couples with XX,XX and XY,XY chromosomes, not necessarily identical chromosomes. Though, it is an odd way of introducing queer couples and does conflate gender with sex chromosomes (and intersex people _do_ exist).