"So what lets keep it simple (like the Germain Grisez) did and simply say an unreasonable refusal is wrong. …
I understand one theologian is not the magisterium. But he is not unorthodox. His statement of the teaching in question is quite clear, please show me a statement from the magisterium which contradicts his words.
I don’t believe I need to Tafan, you are the one who says both that Grisez is NOT the Magisterium and also “its
the Church’s clear teaching.”
I do not believe I have misquoted you here.
If YOU are unable to find Magisterial teaching that clearly confirms Grisez then you really have no basis for exaggerating that Grisez’s words are “
the clear teaching of the Church”.
Now not only are some of your assertions not Church Teaching… I do not think Grisez is saying what you conclude from his quotes that you have provided.
Let’s re-look at all your quotes re your strong assertion that declining for “not being in the mood” is objectively grave moral matter each and every time.
Actually you go even further and say it is not only “grave matter” but an actual sin each time also. (Hopefully you mean venial sin, which is erroneous enough, rather than mortal sin

).
“I think an unreasonable refusal is a big deal each and every time. It is grave matter. See the quote from Germain Grisez’s book I gave above.”
“Let me be clear, each and every single unreasonable rejection is wrong, gravely wrong.”
“the unreasonable refusal of sex is morally wrong, grave matter. Each and every refusal.”
“So I will try to be clear, I initially said that a reasonable request cannot be refused. What I meant that it is only a reasonable request if the other spouse has no reasonable cause to be excused. I may think that having sex tonight is a good idea, but I have no idea my wife has had a really bad headache all day. When she reasonable says no, my request is immediately unreasonable.”
“Assuming you have no reasonable cause for refusal, it is a sin. You may not think it is heinous, but that is the teaching of the Church as I understand it:”
“I have a big problem with the often used words like “regularly”. A reasonable request for sex cannot be morally refused. Moral theology is about individual acts. It is a major sin against chastity ever to unreasonably refuse sex to a spouse. …But assuming the refusal is unreasonable, (IMO, simply not being in the mood certainly qualifies as unreasonable), it is a sin each and every time it occurs. How often it occurs does not matter”
“If one knows that one’s spouse is doing something morally wrong, it becomes the responsibility to bring it to their attention.”
By “a grave matter” Grisez is I believe simply saying its a “serious concern”.
Somehow you have turned this into a technical moral theology term, “grave matter” on each and every occasion. That is a huge and unjustifiable jump.
It would put such refusals up there with the grave matter listed in the Ten Commandments. And if a person did so with full understanding and free choice would damn them to hell and lose the life of God within.
This is not clear Church teaching my friend, sorry.
And even if it were it would not be anybody’s self-righteous obligation to counsel their wife on this at any time - unless perhaps there was a very regular pattern of “headaches”.
I would also disagree with you that “not being in the mood” is never a reasonable excuse.
This is a prudential applied judgement re the abstract principles that even the wisest of theologians likely disagree over. The Magisterium has never come close to ever suggesting such a thing as far as I know.
I would really like to see a referenced quote from GGrisez on this point if you have one.
Sure, a regular pattern of “not being in the mood” and declining may be judged to be getting seriously unreasonable - but each and every rare occasion, I don’t think you will get many women or even men agreeing with you sorry.
Finally, from a moral theology perspective you may like to reflect on the well established concept of “parvity of matter” when it comes to the “grave matter” of certain types of sins.
Theft for example. Generally it is considered to be a sin of “grave matter”, hence it is one of the Ten prohibited Commandments. Yet the Church clearly does teach that circumstances can often render the objective matter from grave to light (eg the item is of relatively trivial value). This means that small acts of theft even if done knowingly and freely can never be considered actual mortal sins, only venial at most.
I suggest our wives can on specific occasions decline for absolutely no good reason (eg not in the mood) and not only may we not physically force ourselves on them or badger them … we may not even consider in our hearts that they have objectively (let alone personally) sinned by doing so.
And I certainly wouldn’t think there is any basis in Church Teaching for somewhat self-righteously finding the right time to counsel them that they have engaged in “grave matter” for a relatively one-off “I am not in the mood” rejection.
So I am sorry, I totally disagree with you that:
(a) frequency does not matter in a moral analysis
(b) “not in the mood” is always unreasonable
(c) we are always dealing with “grave matter” for an unreasonable decline
(d) such is always personally “sinful”.
(e) the Church clearly teaches the above.
I don’t think Grisez is really saying any of these things that you seem to be putting on his lips either. Though I await your full quotes from him on these matters.