In 2008, users on 4chan posted numerous sexually explicit parodies and cartoons illustrating Rule 34 in 4chan slang, pornography may be referred to as 'rule 34' or ' pr0nz'. A list of 'rules of the Internet,' created on the website 4chan, includes Rule 34 within a list of similar tongue-in-cheek proscriptions, such as Rule 63. Since then, the phrase has been adapted into different syntactic versions and has even been used as a verb.

Although the comic faded into obscurity, the caption instantly became popular on the Internet. No exceptions.' The comic was drawn by TangoStari (Peter Morley-Souter) to depict his shock at seeing Calvin and Hobbes parody porn.

The phrase 'Rule 34' was coined from an Augwebcomic captioned, 'Rule #34 There is porn of it. It can also include writings, animations, images, GIFs and any other form of media to which the internet provides opportunities for proliferation and redistribution. The concept is commonly depicted as fan art of normally non-erotic subjects engaging in sexual behavior and/or activity. Rule 34 is an Internet meme which claims that Internet pornography exists concerning every possible topic. For other uses, see Rule 34 (disambiguation).

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