As I said, context matters. Just for a second, let's imagine an elderly person in hospice care, living with their adult child. In the course of the adult child caring for their parent, a grandchild sees that person naked. Is that harmful? What specifically is it about seeing an adult naked that is harmful to a child?

There are many cases where seeing an adult naked would be harmful, and the scenario I just outlined is different than this picture. Seems like it's maybe a dad or uncle with bad taste who thinks it's funny. If that's what it was and those were my kids I'd be fucking yelling at the guy. But I wouldn't be like "you're a sexual predator, time to go to jail."

The naked human body is our natural state. I don't want to see a bunch of naked people, and don't get naked in front of random people. But that's because of our culture, and what being naked signifies about our intentions, not because there's some natural law that doing so is harmful.

This is cultural. Some cultures really do not care about nudity the way others do

Imagine not living in a puritan hellhole