Researchers at the University of Utah in found that human skin contains photoreceptors like those in the retina, allowing it to mount an immediate defence against damaging ultraviolet radiations. The deliberate and conscious wearing of clothing is a behavioural adaptationwhich among all known extant and extinct animals is a uniquely human characteristic arising from functional needs such as protection from the elements. Humans are today the only naked primate in nature, that is, most of the body is not naturally covered by fur. While some European countries, such as Germany, are rather tolerant of public nudity,  in many countries public nudity may meet social disapproval or even constitute a misdemeanor of indecent exposure. The MPAA's ratings can not only be viewed as sexist, but possibly homophobic as well.
Prosecution of cases has given rise to a movement advocating " topfreedom ", promoting equal rights for women to have no clothing above the waist, on the same basis that would apply to men in the same circumstances.
Hollywood has a male nudity problem
Child Soldiers in Liberia: In some situations, a minimum amount of clothing or none at all may be considered socially acceptable, while in others much more clothing may be expected. Nudity in all styles has been and continues to be found in art. Because an NC rating limits audiences and sales for the film, producers stay away from male nudity. Full nudity refers to complete nudity, while partial nudity refers to less than full nudity, with parts of the body covered in some manner.