. . . what does that really mean? Is there a moral or Church guideline that says that marital intimacy should be no more frequent than “x,” or each act last no longer than “y” minutes, or ? It’s puzzling that the Catechism states a moral imperative but gives no guidance to interpreting it. Does this change with age? Is this saying that older couples should “wean” themselves from intimacy to some “moderate” degree?
(Aside from avoiding the intrinsically evil things…)
Everything in life must be kept within “just moderation”…we are Christians…not hedonists…
Hedonism makes the maximum pleasure as much as possible the goal of life…
We are to live according to virtue…
and pleasure is not the main thing…it is subordinated to the persons…etc
How is it governed?
Well no more than 1x per month (

)
There is nothing decreed that one must only have relations x # times a week if that is what you are asking…
So how really are things to be moderated?
Well we are to “walk by the Spirit” and by reason (logos) and by virtue…
So by the Holy Spirit, reason, love and the other virtues…such as justice (there is after all the “marital debt” that each spouse has obliged themselves too in marriage…etc) …prudence and of course…temperance…
(Oh and some may be inspired to follow what Paul mentions… abstaining for a time for prayer…so that can figure into things too at times…)
Lets look at the CCC on temperance:
1809 Temperance is the moral virtue that moderates the attraction of pleasures and provides balance in the use of created goods. It ensures the will’s mastery over instincts and keeps desires within the limits of what is honorable. The temperate person directs the sensitive appetites toward what is good and maintains a healthy discretion: "Do not follow your inclination and strength, walking according to the desires of your heart."72 Temperance is often praised in the Old Testament: "Do not follow your base desires, but restrain your appetites."73 In the New Testament it is called “moderation” or “sobriety.” We ought "to live sober, upright, and godly lives in this world."74
To live well is nothing other than to love God with all one's heart, with all one's soul and with all one's efforts; from this it comes about that love is kept whole and uncorrupted (through temperance). No misfortune can disturb it (and this is fortitude). It obeys only [God] (and this is justice), and is careful in discerning things, so as not to be surprised by deceit or trickery (and this is prudence).75