Gymnophobia

Gymnophobia (from the Greek word for nude gymnos) is the fear of being (or seeing others) naked. A gymnophobic person usually wants to prevent others from experiencing the freedom of not wearing clothes.

Many look at nudism as something that is bizarre and completely outside of the norm. Naturism is a movement toward "body-normalcy" - having a normalized attitude about the complete human body. It's not an extreme thing. It's a sensible, wholesome, balanced attitude. 

There is a condition so common in modern society, most don't even know they have it or recognize any of their own symptoms. It has a name: Gymnophobia. This is derived from the Greek word 'Gymnos' (Nude), and 'Phobia' (An intense, abnormal, or illogical fear of a specified thing.)

Gymnophobia is not a naturally occurring phenomenon - it's an acquired social pathology, passed on from one generation to the next. It likely begins as parents overreact to nudity with their young children, and it is further reinforced throughout their lifetime by the constant association with other gymnophobes. 

Medical dictionaries exist that define Gymnophobia as "Morbid fear of the sight of the naked body." Accepting your own body is the first step in becoming a recovering gymnophobe.

New naturists know this disorder all too well. They know by comparison. They are able to quickly and easily compare their former anxiety about nudity with the comfortable feeling of finally being freed from it. And it is for this reason that grown-up naturists don't revert back to a non-naturist attitude. Once a naturist, there is no desire (rational or emotional) to go back. Indeed Gymnophobia is irrational, and no sane adult would ever choose such an attitude when they've known otherwise.

courtesy: http://www.clothesfree.com