I don't see it as a question of natural. It's "natural" for humans to war on competing tribes. Natural isn't always desirable.
I agree, and I believe I indicated what is natural is not always desirable, just in different words.
The OP asks about the morality of nudity. Morality, as I see it, equates with harm, not personal discomfort. Some people are uncomfortable with anything unconventional or novel. They'd outlaw change itself.
I am aware the OP was asking about morality. I included what I did about things being natural to partially address that point being brought up by other posters. In my first post I stated, "Nudity is our natural state and is neither moral nor immoral..." I don't think my subsequent post backtracks or contradicts that statement.
I agree with what you say here.
I think morally is about "right action" and determining that depends on how one first assesses what the situation is, and then what one believes to be the "right" or best course of action, or at least action that is not harmful. Still, since we're talking about morality, I'm thinking along the lines of what I consider right in specific situations.
When women first began wearing brassieres people found them shocking and immodest. They drew attention to the breasts. Today we're more likely to be shocked if a woman doesn't wear a bra. What changed?
It's what's unusual that raises eyebrows. Nothing is intrinsically shocking.
As for shocking children, it's adults that are shocked by nudity, not children. To children everything is novel and remarkable. They have to be taught what's improper; what to be shocked by.
I think in determining what is moral/not harmful one has to take people and situations as we find them, not what we think they
ought to be. I also think you may have missed my point in that I think "morality" is specifically right action for a given situation.
IMO, it would be wrong, therefore immoral, in this context to decide that because nudity is natural, and kids have to be taught to be shocked by it -- it would be ok (moral) to treat them as though they see things in the way one thinks they should see things, instead of the way they are more likely to actually see them. One can't alter the potential outcome of something by simply disagreeing about whether or not it ought to be that way. Like saying:
You shouldn't even have a concept of there being anything wrong with nudity, therefore any place you encounter it, you should be completely comfortable with it, so now you won't be traumatized if a naked man walks up to you in your elementary school.
Children in school where I live (afasik) already have a concept that people should wear clothes, and I think it would be shocking to the harmful extent for a man/woman to be parading around naked in a school full of children. Just because we might decide amongst ourselves the whole idea of shock/shame around nudity is silly, that would not change the effect of the childrens' experience today. I believe it would frighten them and cause them to feel in danger. It's not the nudity itself, but the situation/action and application of nudity, that would be wrong. Now, if it was a school in a tribal or communal location where nudity was the norm, it would be expected, accepted, and in no way harmful to the kids.
I think morality is, and ought to be, flexible with the changing times. Like the modes of dress you mentioned, things change and the way we view things change. Therefore, what is considered moral is likely to change. I think that's good. Some things were harmful since way back when, and will continue to be harmful into the future, i.e. murder, stealing, rape, etc. I expect those things to continue to be considered immoral.