Surely it's not that hard to understand that for religious, cultural or other reasons some people and/or members of their family may feel uncomfortable seeing nudity.
It is indeed hard for me to understand how someone can feel uncomfortable seeing nudity, as it's everywhere in life and always has been.
1. Sex safety ed needs to be taught, otherwise you get STDs and pregnancies. A couple of hour lecture in school is not enough. Safe sex practices is something that has to be reinforced and encouraged.
2. Respect of consent (and situations where consent cannot happen no matter what either party says) and understanding how to properly express yourself to the opposite sex is extremely important. Our society is full of people who do not treat the opposite gender fairly and do not understand the importance of enthusiastic consent in intimacy.
3. Normalizing sex positive attitude. Many people feel shame from sex/shame others for sexual behavior/repress their own natural desires/etc, this needs to be counterbalanced, especially in a puritanically perverted society like the US.
"Almost nude" simply means not nude, and personal, private nudity is obviously different from seeing other people nude.
Even if someone doesn't mind seeing naked people in the situations you describe, it still doesn't follow they should therefore be okay with nudity on screen in front of their family.
This was one of the stated reasons why we couldn't watch TV or movies that weren't strictly vetted first.
Certainly all the abrahamic ones are fine with detailed descriptions of violence (have you read the Old Testament).
> 2523 There is a modesty of the feelings as well as of the body. It protests, for example, against the voyeuristic explorations of the human body in certain advertisements, or against the solicitations of certain media that go too far in the exhibition of intimate things. Modesty inspires a way of life which makes it possible to resist the allurements of fashion and the pressures of prevailing ideologies.
> 2524 The forms taken by modesty vary from one culture to another. Everywhere, however, modesty exists as an intuition of the spiritual dignity proper to man. It is born with the awakening consciousness of being a subject. Teaching modesty to children and adolescents means awakening in them respect for the human person. [1]
> 2354 Pornography consists in removing real or simulated sexual acts from the intimacy of the partners, in order to display them deliberately to third parties. It offends against chastity because it perverts the conjugal act, the intimate giving of spouses to each other. It does grave injury to the dignity of its participants (actors, vendors, the public), since each one becomes an object of base pleasure and illicit profit for others. It immerses all who are involved in the illusion of a fantasy world. It is a grave offense. Civil authorities should prevent the production and distribution of pornographic materials. [2]
[1]: http://www.vatican.va/archive/ccc_css/archive/catechism/p3s2... [2]: http://www.vatican.va/archive/ccc_css/archive/catechism/p3s2...
> Most of religions forbid people to be naked / see other people naked? Please, list some of them, as I'm having a hard time finding which ones do this.
You decided to respond with a point about pornography. Either you conflated nudity and pornography, or you responded with something unrelated to the question. I assumed the former as that seemed to me to be the more charitable explanation, but if the latter was the case instead, I apologise for the incorrect assumption. Instead, let me ask you: why did you feel it relevant to bring up pornography in response to that question?
If advertising material qualifies, nudity in films qualifies.
I wouldn't be surprised if there are later passages condemning it, but I personally prefer the interpretation that it's not religion which makes nudity uncomfortable, but mankind and their flaws.