Scamp, the issue here is the sexual deviancy of homosexuality and the perversion of human reasoning which justifies that abnormality... Science has demonstrated that the sexual standard is established by the physiological human design, wherein two complimenting genders are designed to join together... which is analogically followed by marriage.
Again, there's
******* in nature. There's no marriage. We invented marriage as a social construct. So means whatever we want it to. We can apply our capacity for reasoning and adapt our own social institutions to the circumstances and ideals that we hold now. Some cultures define it as one man and one woman. Others, one man and several women. We define it as two adults.
The 'joining' part of all of that stuff... is what is called 'sex'... which nature designed as a means to propagate the species; meaning that THAT is how mommies and Daddie show their love for one another and when they love each other enough, YOU were conceived in Mommy's tummy, where you lived for 9 months, until you grew big enough to survive, er uh... to live outside of mommy's tummy.
Yet as you've said before, marriage isn't about procreation. Rendering all your babble about 'mommies and daddies' irrelevant. Millions of infertile couples marry or are allowed to remain marry. The childless enjoy the same benefits from marriage as those with children. And no state requires anyone who gets married to have children or be able to have children.
Demonstrating elegantly that there's a valid basis of marriage that has nothing to do with children or the ability to have them.
How then do you account for the standard you insist we use to exclude gays from marriage neither existing nor applying to anyone? You can't. Ending your entire argument.