One does not analyze “love”, one does it, lives it and feels it. When two people express their love for each other (be they married or not, be of different genders or the same) there is NO need to mix it with procreation. It can be, of course, but it is not a prerequisite.
When a couple is infertile, when there is absolutely no chance of conception, the love can still be there. If the uterus was removed, and conception is impossible, there is absolutely no reason to be “open” to something that cannot happen. This “requirement” is absurd!
Love is sitting by the fireside, or looking at the sunset, no need for words any more, because one can start a sentence, and the other one can finish it. Yet, this kind of love is condemned if the physical expression of it is not “open” to an impossible procreation.
That is the point here!
Or, rather, one of the points. If one takes the bible at least somewhat seriously, then God slaughtered children, toddlers, newborns - indiscriminately! God declares that he will visit the sins of the fathers until the seventh generation. That is not “love”, that is unjust and cruel. A just judge never puts the children or grandchildren into jail for the transgression of the father.
The important point of this thread is that you try to bring the “good news” to the world, you attempt to evangelize, to convince the non-christians and non-catholics, how “wonderful” God is, and how “loving” he is. But you speak a language which no one understands. Love is not indiscriminate slaughter, no matter what the transgressions of the fathers might have been!
The actual expression of love, even if “procreation” is not part of it, does not become “disordered” or “mortally sinful”. It is just simple, good, old fashioned L-O-V-E!