Nudity is the state of wearing no clothing. The term "nudity" can also occasionally be used to refer to wearing significantly less clothing than expected by the conventions of a particular culture and situation, and in particular exposing the bare skin or intimate parts, and has analogous uses. In this sense it is related to the concept of modesty.
Nude modeling is a staple feature of life drawing classes. Poses can range in length from seconds to many hours. Models are most frequently employed for art classes or by informal groups of experienced artists. While posing, a model is expected to remain essentially motionless, and usually remains silent.
Laws against public nudity stem from people's unease with the human body. It makes people uneasy that others are comfortable enough to be naked in public, when they are not.
Katie Mann (from an article in Going Natural, Vol. 17, Number 2)
The best thing to do would be to designate everywhere as clothing optional, and we could leave little fenced in areas for the prudes to prance around in. Call them "Prudist Camps". They could peer out of their fences and indulge in their offensive "I'm offended" behaviour whenever they saw a natural person walk by, without bothering the rest of us.