This memetic Internet "rule" may have originated from a webcomic , captioned "Rule 34 There is porn of it. The exact origin of Rule 34 is unknown, though it may be related to the "Rules of the Internet", a list of protocols and conventions which first appeared on 4chan. Rule 34 first appeared on Urban Dictionary in , submitted by user Nukeitall, who claimed the adage was commonly used on a variety of message boards. Then on October 12th that year, the rule was included in the original "Rules of the Internet" list on the Internet culture wiki Encyclopedia Dramatica. Internet users have made Rule 34 into a prevalent meme , owing to the ubiquity of Internet pornography , especially among genres such as fan fiction , slash fiction and hentai.