rule 34

An internet meme pertaining the pseudo-rule that states, "If it exists, there is porn of it. No exceptions."

Traditionally used to refer to porn featuring an uncommon or unconventional subject; for example, some characters or objects that would otherwise will not be sexualized except for either shock value or as a freak fetish.

For posts that exemplify this concept, please use Danbooru pool #730 instead. For posts which specifically reference Rule 34 the concept, see Rule 34 (meme).