Clothing protects us from the potential ego-centric abuse because of lust which comes from the fall. If we reveal too much, another person may have lust towards us and want to use us.
What is more, in knowingly dressing like that we actually abuse ourselves. We either make ourselves into objects of gratification for others, or even derive some masturbatory kind of pleasure from exposing ourselves.
This still doesn’t create an abstract and fully precise limit of coverage or exposure, though.
Finally he assigned to everyone - both man and woman - their own dignity, in a certain sense, the sacrum of the person”
That sacrum of the person would be the core of the matter. The inches are ancillary to it.
The Catechism says modesty involves not revealing what ought not to be revealed.
But of course, but once again, that doesn’t mean “N inches”. You have the inches in your head, so when you read, “what should be hidden,” you automatically associate and replace it with, “ah, that would be N inches here, X inches there and this or that exact point must be hidden at all times.” But that part is not in the Catechism and is synonymous with its words, in fact.
Intentions are significant. Yet arousal can occur without the intention for it, which is why a woman can reveal parts of her body and cause arousal in a man even when it is not her intention.
Of course, but the mere occurence of arousal, let’s say, by accident, doesn’t automatically mean some sin must have been committed somewhere and somewhen (except maybe the original sin). Sins always include intention. Immodesty may be a result of direct intent or negligence (culpable ignorance), but you cannot commit a sin without an act of will at some point in it. Without a choice in other words.
Nudity is more modest? Then why don’t we all dress naked? Because of concupiscence.
I’m sorry, but that’s wrong. You seem to think only exposure of body appeals to concupiscence, whereas all the “come hither” designs and devices do not. It is most certainly possible to lust after a fully covered person. It is also possible to make an all-covering outfit immodest as well. Everyone knows this. You can’t pretend it somehow doesn’t arouse. All those outfits two sizes too small, with captions on the butt and all sorts of devices to attract attention to the breasts or the crotch. Do you think it matters less than some skin?
Also, part of the reason the human body needs to be covered somehow is that it’s sacred. You mentioned that by quoting John Paul II. Whereas the human body is sacred in some ways, a G-string, let’s say, is not sacred in any way and in most cases will have been designed to titillate (and ultimately to lead into sin, whereas the human body wasn’t), not even to allow easier tanning. What’s more immodest, a statue from the Vatican museums, or a g-string photo? I would argue that what people wear nowadays is much more immodest than a Greek statue.
Sure, being provocative may be worse than simply being naked, but that doesn’t mean that nakedness doesn’t awaken lust at all in itself. One may be worse but doesn’t mean the other does nothing.
Yup, and if it’s worse in terms of leading to sexual sins, then it’s more immodest.
On a final note, no one here is arguing how fun and nice it is to walk around naked. Just that modesty is not defined in inches outside of time and space.
You do well in pointing out and reminding that a subjective decision that this or that is okay to wear doesn’t make an objective exculpation for the wearer. We can’t shed our responsibility by a unilateral decision that we are not culpable because that decision is not ours to make. Therefore, we can’t make our standards of clothing immune to any judgement whatsoever. The fact we think it’s fine for us to wear something doesn’t mean there’s no problem with it for other people - or even in our own minds (that we could be unable to notice in our ignorance). But this all doesn’t mean that there is some abstract standard measured in inches. Clothes are an expression of the modesty that is in our minds.