He reffers to opinions regarding ritual washing and how are people to clean themselves (from sexual pollution). He is not mentioning opinion that sex does not make people polluted.
Different customs imply a different understanding of the topic at hand. When St. Gregory speaks of the different opinions concerning “this affair”, he is referring to the custom and the theology that gave rise to it.
Layman were required to obey decisions even if they were not part of Ecumenical Councils, similar as today. If you were forbidden to recieve Communion because you thought sex can be practiced for love, then Councils are not your biggest problem

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The forbidding of particular people from Communion for a particular reason is in part a matter of discipline and therefore subject to change. Hence, the same custom that St. Gregory mentions is not continued in the Roman Church today.
Regarding you statement concerning sex being practiced for love I don’t think that the people of those times see things in the way you see them.
Augustine’s gradation goes the other way. Offspring is sacred, fidelity is bad but tolerated, and sex is not sacramental (since it contains sin). If you need two thousand years of teaching this to come to Theology of the body, well… who knows what awaits us?
I think you’ve made a mistake. To St. Augustine offspring, fidelity and sacrament are the three
goods of marriage. Sex for the sake of having children is
good. Sex for the sake of avoiding fornication is a venial fault on the person who needs it. And why would it not be? The person who has sex merely for pleasure makes his partner an instrument of such. If I am correct, to St. Augustine, sex is not bad in itself, tainted it may be. It is the concupiscence that is bad.
Sorry- I simply can’t accept that my position is maximizing anything. Periodic continence has only one form, and it is very basic (abstaining on specific day). Tracking your temperature or mucus is just a technique to see whether it is a day for continence or not.
Let me pose this question: Did St. Augustine know about NFP? Did he condemn it? If you cannot answer yes to the first question, the second one is already a no.
Augustine forbid tracking the menstruation cycle in order to detect infertile period. To say “but that is not NFP” is simply a huge moral relativism we usually condemn in others. Infertile period is sole base of any natural fertility technique, and using it with desire to have sex without conception is- to Augustine and stoic fathers- an abuse of nature.
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I will admit that it is possible that he frowned upon it because of his emphasis on procreative intent. However, it is inaccurate to state that St. Augustine in writing forbid such a thing. Regarding the quote I think you are addressing, St. Augustine is more at opposition with the Manichaeans
reasons for abstaining from sexual intercourse than he is with the actual abstinence. Hence he says:
“Is it not you who used to counsel us to observe as much as possible the time when a woman, after her purification, is most likely to conceive, and to abstain from cohabitation at that time, lest the soul should be entangled in flesh? This proves that you approve of having a wife, not for the procreation of children, but for the gratification of passion.” (
On the Morals of the Manichaeans, Chapter 18)
But these teachings are the root of the Church position. And if things get complicated at roots, what happens at branches?
NOT all of them are, but most of them are. And you ought to concern yourself not just with the small part that isn’t, but even more so with large part that is.
Good Daughter misquoted me. She though I was talking about marital debt, while I was talking about sex during infertile period.
Marital debt was permitted altough frowned upon. Sex during infertile period was considered marital debt as long as it happened because of uncontrolled lust. To track fertility in order to to have unprocreative sex was forbidden. It involved non-permitted desire.
To my knowledge, only Augustine speaks of any kind of periodic abstinence and even there he does not explicitly say it was forbidden. Therefore, from where did you get this idea that it was forbidden?
Jesus certainly had nothing to do with the idea sex carries the burden of sin. He was with the peasants on that one, not with bishops.
Jesus said that the gates of hell would not stand against his Church. That includes error. That was what I meant.
Furthermore, you have no idea what Jesus’ opinions were on this matter since they are not written in the Bible. But with faith I say that they are the same as the Church’s.