I believe the poster said that sex was not only for self-gratification.
There is more to heterosexual relationships than having babies or gratification.
It is this relationship, founded on Gospel principles, that leads both partners to eventual perfection.
"Nevertheless neither is the man without the woman, neither the woman without the man, in the Lord." (1 Corinthians 11:11)
Men and women sealed in the marriage covenant make up both sides of the same coin. They become "one" eternally.
The issue that I and many others have with homosexuality is the fact that those relationships are not ideal, draw the partners further away from their eventual perfection (which stunts their eternal potential) and leads to endless misery in the life after this one.
There are no double-sided coins in Heaven.
I ask again why bring it up in the first place if not to try to shame gay people for not procreating?
And there's more to homosexual relationships than "teh gay butt sex." Or sodomy, if you prefer.
Also please correct me if I'm wrong here, but the traditional definition of sodomy used to be literally anything other than vaginal sex. There are actually old timey real life pamphlets explaining the sin of married couples performing oral. I remember they were shown in my history class to illustrate the differing attitudes of yesteryear. So even standing against sodomy is inaccurate when solely focused on "the gays." Mote in one's own eye, indeed.
If heterosexual couples are ideal explain the strangely high divorce rates. Explain why in study after study after study (ad nauseum) gay couples are found to be happier
in spite of unequal treatment (my country only legalised gay marriage this year) homophobia, society at large shaming them for not proceating and churches constantly telling them they are sinful. If anything they have been found to have stronger bonds than a lot of heterosexual couples do.
I mean if anything forcing or coercing a gay person into a heterosexual relationship is far more stunting. (Not saying you're advocating that, of course. But it does happen in some communities.) That's far more unhealthy and leads to misery, broken families and all the so called detriments people blame gay couples of having.
So these claims don't seem to stand up, at least to my point of view.
Just seems such an innocuous thing to even care about.
If you're going to stand against anything, at least have it be something with tangible real world detrimental consequences.
The best the anti side can even come up with is they don't have progeny. With 7 billion people strong, pretty sure the population won't notice if some couples don't have kids.