Yes, the nude body can be artfully represented, but there's a place for it . I never censored my children much, and I am an artist. But I would not want my elementary school children exposed to nude art while perusing the children's book section at the library.
I think the library should respect your wishes, -- it is, after all, not a museum, -- but why, really, would you be concerned with such exposure?
In my view, it is far better to inform the prepubescent child of the look of the adult body of both sexes, if only to remove the sense of mystery when puberty hits.
I agree. Placement of nude art should be based on many things. But if dealing with locations where children are the snicker factor must be the determining criteria.
What is the snicker factor? Simply put it is how long a group of boys or maybeeeee girls will snicker at the nude painting. If it is known that the snickering will be of brief duration the painting can probably be placed nearby. But if the snickering is overlong and leads to favorite body part jokes it is best to place the nude very much elsewhere.
When I was in High School, we went to the MMA in New York; there were plenty of nudes. We came across one, and the curator asked, "Guys, this one hits you different, doesn't it?" It did.
The curator explained subtle surrealties that classical artists used that made the nudes somehow not arousing, and contrasted them with the one that did.