Come in to my forest and I may just munch on you for lunch!

If we were raised "naked" and everyone were naked, would we know we were naked? (mind you this is supposing a warm climate is present). Would we be more or less body conscious? Would we be as sexually uptight as many are now? Why do we feel the need to be covered?
My grand daughter , when she was little, was always taking off her clothes and running around like a little free spirit.
It took many adults many scoldings to convince her it was a "wrong" thing to do. In her "innocence, she saw no wrong in being naked. She probably would have kissed and hugged boys and girls alike also if we had not told her  not to.
If children were left to their own devices would they have a sense of right and wrong?
Looking for input!