Acceptable television content varies widely around the world. Many countries restrict nudity on television and one of the most restrictive countries is the US.
Generally, UK television can have no nudity before 9 pm. European television tends to be far more relaxed about nudity and it can be seen at all hours in some countries.
The restrictions are based on the cultural norms of the population and are normally the interpretation by the country's regulator of what is considered acceptable. It is interesting to see that many American programs can show sexual activity even if nudity is not allowed.
As for violence, the same regulators make rules for violent scenes on television and they are often less strict than nudity. There are may people who question the wisdom of censoring nudity while allowing a great deal of violence to be seen. There is no easy formula for the decisions but regulators can be swayed by their perception of public opinion. If enough people raise concerns about violence, rules may be changed in response.
Nudity is censored on public TV because children don't need exposure to the sight of naked bodies! Censoring TV nudity ensures that children only get to see programs and content suitable for all ages. Usually programs containing nudity are restricted to a 'watershed' time - for example 9pm - when most younger children are normally in bed.
There are two main types of material that are censored on television, nudity and language. However, the rules about what is allowed is changing all the time. Certain words that were not allowed 5 years ago are now common place on television. Many parents do not like this.
Usually it is censored through a brief broadcast delay.
Censored - 1999 TV was released on: USA: December 1999
America Censored - 1985 TV was released on: USA: 28 May 1985
It is very censored.
TV's Most Censored Moments - 2002 TV was released on: USA: 10 June 2002
In the UK, nudity is not allowed on TV in the daytime. After 9PM however, swearing and topless women can be seen and heard. After 11PM, full nudity is allowed.
All-Time Great TV Censored Bloopers - 1985 TV was released on: USA: 1 February 1985
There has been zero male nudity on Dr. Oz. Nudity wouldn't air during daytime TV.
They Sometimes Swear. And The Swearing Is Censored
Gore Vidal - 1995 TV was released on: USA: 12 October 1995