I can't answer for orleander, but I can tell you that what you describe is perfectly normal in many families, and some communities, and has been for generations.shorty said:
But not the simplemindedness you ascribe to it. It is not heedless, or in denial. There is always a structure - areas in which nudity is OK, areas in which it would have wrong sexual meaning. Teenagers are monitored.
Many families swim nude, for example. Many Scandinavian families sauna nude. Some farm communes have outdoor, unscreened showers for coming in from the field or garden. Welsh coal miners washed the coal dust off in the main living room, sisters and daughters and wives fetching water and soap and towels for brothers and fathers and husbands.
I'm not sure the modesty obsessed actually understand how that looks to someone from a different tradition.
I can recall hearing Finnish housewives laughing at porn-obsessed Germans who were shocked at the casual nudity of the sauna.
There is a memoir tale of a Finnish immigrant in the early 1900s who, just off the boat in New York, saw a group of men whistling and cat-calling at a woman who had revealed her ankle stepping over a puddle. He thought they were retarded - not pejoratively, just in that way you feel sorry for the mentally deficient. He had seen many women's ankles, and everything else, and didn't understand the situation.
The roots of nonsensical modesty (bathing suits, little dolls with numbers for the doctor to ask questions about instead of direct examination, chadors and burkas, etc) seem, to me, to lie in traditions of economics and power. The powerful can buy and force personal access - and withold their own. The commoner cannot look at the King's Lady naked, cannot look at the King at all, but the King can look at anyone anytime - those privileges, like lawns, symbolize more than they effect.
