I will apply the above to my post as it reads now:
" In the conjugal act it is not licit to separate the unitive aspect from the procreative aspect, because both the one and the other pertain to the intimate truth of the conjugal act. The one is activated together with the other and in a certain sense the one by means of the other. Therefore, in such a case the conjugal act, deprived of its interior truth because it is artificially deprived of its procreative capacity, ceases also to be an act of love."
~ Bl. Pope John Paul II General Audience, August 22, 1984
Such is regarding contraception.
They may not think or feel that such is so --but it is.
Do couples who are committing fornication - would they say that they find it to be true that they are acting against love? They may not think they are but they are.
Do couples who are committing adultery - would they say that they find it to be true that they are acting against love? They may not think they are but they are. They may think they have now “found true love” …but they have not.
If you asked them if they “found it to be true” -they may say no. Such is the measure of the objectively moral reality involved.