I can choose not to go to a nudist beach. If I went and found it offensive it would be entirely my own fault.
You can also choose not to look at someone elses breasts while they are breastfeeding or at someone elses shlong at the urinal. There's nothing offensive about nudity itself, its individual perception and the associated stigma that you seem to have attached to encompass ALL nudity regardless of context.
I don't need to look at nude models; they aren't allowed in general publications such as newspapers - you have to actively seek them out.
Have you seen a page 3 girl before?
A nude statue is intrinsically different from a real person. There is no need for embarrassment. You don't need to avert your eyes or awkwardly apologise. A statue is stone.
Why is there a need for embarrassment?
Even without locks, they still have doors.
Bedrooms also have doors. Why?
Why do all these places have doors? Is it not for privacy? Please explain why you think privacy matters in the home, but not in public? Ie, so a public urinal is fine, but you'd close the door whilst in the loo at home? Isn't consistent.
It is for privacy - but only in part - and its optional - you don't have to close the door when using the loo or having a shower or sleeping. It's not a prerequisite! That's why I asked my original question: why you think it SHOULD be done behind closed doors when in actual fact, there is no requirement to do so and there is no widespread alignment with your own view on this.
What about open plan bedroom and bathrooms? No doors there.
Mezzanine living spaces?
I even have had communal showers!
But I think it would be pushing my luck.