They suspect that the protein that protects the skin from sunlight evolved following the loss of protective hair, which happened about 1.2 million years ago.
People have a variety of views on nudity, both of their own as well as those of others.
Non-frontal nudity describes nudity where the whole back side of the body, including the buttocks, is exposed, or a side-view from any other direction.
Hair probably evolved in mammals before about 220 million years ago.
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.
Arousal is most evidently indicated by the sex organs and women's breasts, which are routinely covered, even when other parts of the body may be freely uncovered.There are many exceptions and particular circumstances in which nudity is tolerated, accepted or even encouraged in public spaces.Such examples would include a nude beach, within some intentional communities (such as naturist resorts or clubs) and at special events.Social considerations involve cultural issues of modesty, subjective decency and social norms, besides other considerations, and these may depend on the context. Full nudity refers to complete nudity, while partial nudity refers to less than full nudity, with parts of the body covered in some manner.
The term "partial nudity" is sometimes used to refer to exposure of skin beyond what the person using the expression considers to be within the limits of modesty.The amount of clothing worn depends on functional considerations, such as a need for warmth, as well as social circumstances.