Like you said, many cultures have different opinions about showing the body or not. I grew up in Germany and we all used the bathroom at the same time - one on the toilet, one washing up or brushing teeth. That is what happens when you have one bathroom and seven people in the family.
A body was a body. Everybody in a sauna was naked and there was a mix of sexes and ages. Same true for going to the beach or the pool. For example, people wear a swimming suit. But if they want to change from a wet one to a dry one, they take off the wet one, dry themselves, and put on the other one. right in the middle of the crowd, so to speak.
But in the US,it is a different story. Naked body = sex here. It is used a lot. Think of all the ads with barely dressed women and - you name it - a burger, car, motorcycle. Heck, even laundry soap sells better with a half-naked woman attached.
Oh, and breasts!!! Let's shame people when breastfeeding in public! Obviously, breasts were made to be used in ads and fantasies.
Yes, so sad.
That said, starting to put naked pics on social media might not be the answer. Getting in touch with our bodies, on the other hand, is. WE can be strong and proud of what we have - no matter how old - or ugly (there are no ugly bodies btw.)as you put it- no matter if we are naked or clothed.
That is what matters. Not what others are thinking.