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 deliberate and conscious wearing of clothing is a behavioural adaptation, which among all known extant and extinct animals is a uniquely human characteristic arising from functional needs such as protection from the elements.Protection from the elements includes the sun (for depigmented human populations) and cold temperatures after the loss of body hair and the migration of humans to colder regions (around 100,000 years ago) in which they had not evolved and thus lacked the necessary physical adaptations.
Partial frontal nudity typically only refers to the exposure of the breasts.
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.
These may be in a naturist resort or club or at a nude beach.
Outdoor nude recreation can take place in private or rural areas, though generally limited to warm weather. Topfree sunbathing is considered acceptable by many on the beaches of Finland, France, Spain, Italy and most of the rest of Europe (and even in some outdoor swimming pools); however, exposure of the genitals is restricted to nudist areas in most regions. to be barechested or shirtless when engaged in outdoor recreational activities.
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.