Rule 34 is a widely known internet maxim which states that "If it exists, there is porn of it. No exceptions." This rule has become a popular meme within internet culture and is often used humorously to highlight the abundance of adult content available online. It serves as a reminder that virtually anything can be turned into sexualized material, regardless of how innocent or unlikely it may seem. The rule is often referenced in discussions about internet censorship, freedom of expression, and the vastness of online content.