Nudity, or nakedness, is the state of wearing no clothing. The wearing of clothing is a predominantly human characteristic arising from functional needs such as protection from the elements and from cold temperatures, after the loss of body hair, and migration to colder regions. The amount of clothing worn depends on functional considerations, such as a need for warmth, as well as social circumstances. 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. Social considerations involve issues of modesty, decency and social norms, besides other considerations, and these may depend on the context. There may also be legal considerations.