rue marriage leads to procreation...which is bottom line ultimately why the vows are said...so the kids are not foisted upon society to take care of. Random sex “acts” in all shapes and form are not marriage...the real thing is.
You can refine that. While even some heterosexual couples can’t reproduce, they can still set an example for what most families should be. Take my grandfather for instance. He and his second wife are both remarried, and too old for children. However, they do all they can to care and act as both parents and grandparents, examples of what parents should be (one man, one woman), even though they don’t reproduce through their marriage, they do this instead with future generations in mind) Remember, it’s mostly about the kids and the general example being set for them as to what they should be when they grow up.
But with or without kids man-woman love is still a God-given model for society which others (whether they end up bearing kids or not) will benefit from. Agreed.