I think that the phrase you are trying to say is 'Nothing'. Other than the title of the album it is simply a picture of a naked individual. If anyone finds it sexually arousing then perhaps there it is something wrong with them and not with the cover?
I'd like to respectfully disagree, because there's a difference between "arousing" and "sexualizing". The picture is not arousing, but I would certainly agree with the GP that the image is sexualizing, in the sense that it focuses on the girl's purported sexuality (though not in a way meant to arouse, or at least not obviously intentionally so). As the GP says, the girl's pose makes it quite clear that she doesn't just happen to be naked.
I certainly would not call it pornography, however, as the picture does not seem to be intentionally taken to be arousing. That's not really the matter here, though, I think. You state that you think that this is an extension of society's problem with accepting that people are born naked, but I would disagree with that, too. I rather think that this is just a problem with society taking its zeal against child pornography much too far.
The zeal against child pornography is, to a very large extent, justified, but what has come to pass is that society has turned from the actual reasons why child pornography is bad, to a general stance against child pornography in whatever shape, form or nature it appears in. That's why this image is being censored. It's close to being child pornography, and therefore it must be immediately banned, and its creators burned at the stake. Preferably immediately!
What they miss is, of course, that child pornography isn't just bad because it exists, but because of the effects it has on the children involved. Outright child pornography more often than not has children either being abused, or being fooled in such a way that they will come to regret it later in life. Furthermore, the very usage of child pornography fuels the industry that causes such crimes to be committed. Of course, that's a bad thing and should be stopped by society. In this case, though, that hasn't happened. The Wikipedia article makes it clear that the model has expressed that she does not regret the picture, and there's no reason to think that these things will fuel the child pornography industry in any way. No crime has been committed, and there's no reason to censor or punish anything.
Furthermore, the zeal against child pornography has definitely been taken too far. I'm seeing it being used to power anything from censorship to surveillance, and I am not convinced. It's like the Spanish inquisition! Is it a hideous crime to abuse children to produce child pornography? Of course! Is it worse than murder? Very doubtfully so. Should the enforcement against it affect our civil liberties? Definitely not!