You're not very familiar with other religions, then. I was raised in a religious environment that absolutely forbade people to see members of the opposite sex naked except in very specific scenarios (ie married couples, doctors treating patients, and that's about it).
This was one of the stated reasons why we couldn't watch TV or movies that weren't strictly vetted first.
Religions or cultures don't forbid this in general, but some do for purposes outside of procreation. It's really not "everywhere in life" for most people.
I take a shower in the morning, nude. I go to the beach, there is nude people. I go to the gym and after taking a shower, nude people. I look at Instagram/Facebook/Any social media, there will be almost nude people, same with ads all over the place. Sometimes I sleep naked too. If you have a family, there is plenty of nudity and can happen at any point. Anyone who raised a child will give you an idea of how much nudity there really is in life.
That's not everywhere, it's two examples. Beaches and communal showers.
"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.
That's like saying you are always nude under your clothes so nudity isn't a problem. Nudity in movies is like softcore porn and they often come with bed scenes. Of course if your family is just you and your wife it's fine but I don't think any sane person would consider that ok for kids.
Why not? I’d definitely be more ok with a soft core scene than some brutal violence. Sex is normal/good part of life. One should educate kids about sex (and when it is appropriate) rather than pretend it literally doesn’t exist.
Yes and no. Teens/young adults will have sex whether you accepts it or not. However, how they do it and how they feel about it definitely depends on education.
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.
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.