Rule 34

2004catchphraseclassic

Published September 26, 2026

Rule 34 is the internet adage that if something exists, there is pornographic art of it, with no exceptions. The rule started with a 2004 web comic by British teenager Peter Morley-Souter, and grew into a self-fulfilling maxim backed by fan art archives, image board challenges, and a decade of Ruined Childhood spinoffs.

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Overview

The rule works as both a joke and a dare. Fans treat any absence of porn as an invitation, and a companion Rule 35 was added to spell out that if the porn does not exist yet, someone will draw it4. Common targets include children's cartoons, video game characters, corporate mascots, and inanimate objects, sitting alongside Ruined Childhood memes as a specific style of internet transgression.

Rule 34 typically shows up in two shapes: individual fan artworks placing fictional characters in sexual scenarios, and mass image board threads that try to prove the rule with the most unlikely subjects possible. The 2008 4chan thread became the canonical example, cycling through porn of Tetris blocks, fruit, gummy bears, giant robots, and cartoon characters as living evidence1. Tag-based archives like Paheal.net gave the joke an actual searchable index that fandoms kept feeding for years.

Origin & Background

Platform
Zoom-Out webcomic / 4chan (viral spread)
Creator
Peter Morley-Souter
Date
2004

Rule 34 traces back to a single-panel web comic drawn by British teenager Peter Morley-Souter and posted to the UK humor site Zoom-Out around October 20041. In the strip, a character reacts in horror to a Calvin and Hobbes pornographic image, punctuated by the caption 'Rule 34: If it exists, there is porn of it, no exceptions'2. The comic spread quickly and reached 4chan, where the line was folded into the site's early 'Rules of the Internet' list1.

A competing origin claim showed up much later, in May 2009, when Something Awful user Electric Eggs opened a thread titled 'Ask me about inventing Rule 34,' saying he and his sister came up with the adage after hearing a version of it in an IRC channel4. Morley-Souter's comic is still the widely credited source.

How It Spread

After bouncing around message boards, the rule picked up its first Urban Dictionary entry on March 30th, 2006, and joined the original 'Rules of the Internet' list on Encyclopedia Dramatica in October of that year, alongside the newly added Rule 35 addendum4. On August 20th, 2007, XKCD published a comic titled 'Rule 34' built around a woman propositioning her guitar, bringing the concept to a much wider webcomic audience1.

On February 17th, 2008, an anonymous 4chan user opened a /b/ thread called 'Rule 34 thread' that collected more than 365 replies before it was archived3. That thread cycled through porn of Tetris blocks, fruit, gummy bears, giant robots, and cartoon characters, treating the rule as a personal challenge to disprove1. Dedicated infrastructure caught up alongside the culture, most visibly with the Rule 34 image database that opened on Paheal.net in May 20074.

The rule kept getting recycled through new fandoms as the years went on, powering fan art around SpongeBob, Alvin and the Chipmunks, Animal Crossing, and many other franchises, and pairing with its sibling Rule 63, the gender-swap rule, in the wider 'Rules of the Internet' canon.

How to Use This Meme

The phrase gets deployed in two main ways. As a claim, someone posts a specific character, object, or franchise and drops 'Rule 34' as shorthand for 'the porn already exists, go look.' As a format, artists and thread posters treat the most absurd subject they can think of (Tetris pieces, kitchen appliances, single-celled organisms) and produce the porn to satisfy the rule. The common convention is that the more unexpected the subject, the funnier the payoff.

Frequently Asked Questions