Not at all, I even have a
photocollage nude on my website. I'm just pointing out that some people might interpret some nude photos as pornography, even though the creator might consider them high art. The obvious example is Robert Mapplethorpe's work which was hugely controversial in the US. In Boston when it was shown at the ICA in 1990 there were protests for and against the exhibition, and some of the older city councilors tried to prevent the exhibition from opening. Interference by the US Senate scuttled the same show when it was supposed to go to the Corcoran gallery in Washington, D.C. and resulted in huge changes to the National Endowment for the Arts. I do consider his work art, and any gallery in the US or Europe would probably have no legal problems now showing his work.
Anyway, my point was if the creator intends a nude as art, even a highly erotic or sexually charged one, the photographer should have an easy time avoiding prosecution for making or exhibiting the work. Pragmatically, if it's called "art" in the US, a photo will enjoy the protection of the First Amendment, while pornography will have many more restrictions placed on it (subjects must be over 18 years old, minors must be protected from seeing it, et cetera).
That's the theory anyway. Unfortunately, some photographers nevertheless experience harassment from over-zealous law enforcement. In a case in Cambridge, Massachusetts in 1995, Toni Marie Angeli took pictures of her son nude for a photo class and took her film to Zona, a professional photo lab, for development. When she went to pick up the negatives, she was shocked to be confronted by police who had been called in by a lab technician. The confrontation escalated and the police arrested her for disorderly conduct (for saying F*ck you and knocking over a lamp), and pornography charges were never instigated. She was convicted on the disorderly conduct charge.