I disagree with your assessment of #0. It is extremely gory, repurposes religious imagery in a secular context, and was considered such a menace to society that it could not be shown in museums and had to be hidden for 15 years.
And I think #3 and especially #4 were not meant to depict nudity devoid of a sexual context. With Fragonard, there is often an acknowledged voyeuristic element, even in paintings where there is no nudity, such as https://www.wikiart.org/en/jean-honore-fragonard/the-swing-1... (cf also the original French title).
But it's kind of twisted that we consider it less weird to look at a person nailed to a cross than one engaged in a prelude to a reproductive act.