I have been to this point unwilling to sign on to same-sex marriage primarily because of my understandings of the traditional definitions of marriage. But I also think you're right that attitudes evolve, including mine.
Eyes are bold as lions,--roving, running, leaping, here and there, far and near. They speak all languages. They wait for no introduction; they are no Englishmen; ask no leave of age or rank; they respect neither property nor riches, neither learning nor power, nor virtue, nor sex, but intrude, and come again, and go through and through you in a moment of time. What inundation of life and thought is discharged from one soul into another through them!
It is true from early habit, one must make love mechanically as one swims; I was once very fond of both, but now as I never swim unless I tumble into the water, I don't make love till almost obliged.
The sex illusion is not a fixed quantity: not what mathematicians call a constant. It varies from zero in my wife's case to madness in that of our stepsister.