Pornography or porn is the portrayal of explicit sexual subject matter for the purposes of sexual excitement and erotic satisfaction.
Pornography may use any of a variety of media, ranging from books, magazines, postcards, photos, sculpture, drawing, painting, animation, sound recording, film, video, or video game. However, when sexual acts are performed for a live audience, by definition, it is not pornography, as the term applies to the depiction of the act, rather than the act itself. Thus, portrayals such as sex shows and striptease are not classified as pornography.
A pornographic model poses for pornographic photographs. A pornographic actor, also called porn star, acts in pornographic films. In cases where few actor skills are required a performer in pornographic films is also called a pornographic model.
Pornography has often been subject to censorship and legal restraints on publication on grounds of obscenity. Such grounds and the very definition of what is or is not pornography have differed in different historical, cultural and national contexts.
Over the past few decades, an immense industry for the production and consumption of pornography has grown, with the increasing use of the VCR, the DVD, and the Internet, as well as the emergence of social attitudes more tolerant of sexual portrayals. Amateur pornography has become widely popular and generally distributed via the Internet for free.
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