This is not a trick question and there are no black and white answers either. Even though, from an online dictionary we get this ‘-n  the practice of nudity, esp for reasons of health, religion, etc.’ And the Encyclopedia Britannica states that nudism is ‘ the practice of going without clothes, generally for reasons of health or comfort. Nudism is a social practice in which the sexes interact freely but commonly without engaging in sexual activities.’

But nudism is a gray area that most people all over the world fall into in varying degrees.

Here are five (5) categories for nudism:

1.       Researching -- There is an interest in being socially nude but these people want to make sure they will be safe in a nudist environment and comfortable with body issues before taking the plunge.

2.       Part time at home -- These people will walk around the house nude at some point but quickly dress when someone enters the room or they start to feel uncomfortable without clothes on.

3.       Full time at home -- They feel comfortable being nude at home-either alone or around family and friends; but have not made the decision to interact nude with people they do not know.

4.       Part time in public -- These social nudists will only go bare occasionally for a weekend or nakation (nude vacation) and usually it’s in a location far from their home (just in case they might meet someone they know). 

5.       Full time in public -- Being without textiles is a must with these nudists. Of course they do, on occasion, put on clothes when needed (i.e. during cold weather, going shopping, or going on trips where nudity is unlawful)

As you can see, there are many degrees of nudism and everyone has experienced it at one point or another.

Internet site reference: http://www.examiner.com/nudist-culture-in-national/nudism-101-what-is-nudism