Those who are positing that the Church has no teaching or that disordered sexual acts can be justified if a couple is infertile, pregnant, or post-menopausal are NOT stating Church teaching.
The Church teaches the opposite-- the Church teaches that each act of intercourse must be per se ordered to procreation and unity.
The reason that this scenario arose, was that the OP on another thread was arguing that if a condom is perforated to allow a miniscule amount of semen into the vagina on ejaculation, that that indeed counters the Church objection to a condom. It therefore follows that the same condom used for the purpose of reducing the chance of conception can’t technically qualify as contraception.
The argument is that an intact condom is in and of itself intrinsically evil or a perforated of broken condom is not intrinsically evil.
If anyone remembers any of my years worth of posts, you’ll see that I’ve argued long and hard with the Church without wavering on the evil of contraception. I’ve also never used contraception myself in my 26 year marriage and was a virgin on my wedding night so never had cause to use it prior to marriage. I’ve always completely understood the reasoning behind the Church teaching because to be honest it makes sense. Even an amateur understanding of natural law supports the principle.
For a thing to be contraception, it has to involve an
act of the will. The CCC says…
1751 The object chosen is a good toward which the will deliberately directs itself. It is the matter of a human act. The object chosen morally specifies the act of the will, insofar as reason recognizes and judges it to be or not to be in conformity with the true good. Objective norms of morality express the rational order of good and evil, attested to by conscience.
In the scenario proposed, the people an elderly post menopausal couple where the wife has grown allergic to semen. The medical experts in their medical capacity recommend using a condom when having sex. If the couple consults a Church expert or canon lawyer, are they guaranteed to be forbidden this medical advice and advised that the only sin free option is a sexless marriage? Or is the Church more inclined to allow medical advice and prudential judgement considering the circumstances ie. is is not chosen as contraception. It cannot be contraception since they by nature are past fertile functions.