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We have a page on Facebook, and we're offered a $10 voucher to "boost a post," meaning that you pay FB money so they show your post to more people---it's a transparent form of advertising, of course. Ten dollars for free, what the heck, so we boost Teaser #14 of This Is Heaven...but...wait...the boost is rejected. It wouldn't be a "pleasant experience" for FB users, especially the pecs of Robert Pattinson won't. Next we try Teaser #15 (the balloon dog shorts). That's rejected as well, on the same grounds. Well, let's see, what could be more unpleasant than an ungeheures Ungeziefer, a monstrous vermin à la Franz Kafka. We try, and succeed. The boost is accepted --- a pleasant experience indeed.
Along those lines...here we have the cover of Perry Brass' book Carnal Sacraments...
...adorned by the work of the German painter Sascha Schneider, a highly recognized Symbolist artist. Amazon---Amazon, this time, not FB---doesn't let Perry place advertisements for his book because of the 'nudity' on the cover.