Porn is X-rated content that shows explicit sex. Whereas "softcore" or "nude" implies just nudity, porn — also known as explicit content — displays people engaging in sexual acts. You may find nudity and simulated sex acts on HBO, for example, but you won't find porn. While porn is most often thought about as video, there is also audio porn and written porn, typically called "smut." One of the most popular sites to view porn is Pornhub, which is one of the most trafficked sites in the world. There are many other ways to watch and pay for porn, however, like following individual creators like OnlyFans. There are also many categories of porn. Whatever someone might fantasize, there is surely porn for it. The ubiquity of both porn and the vastness of human interest had led to Rule 34: If it exists, there's porn of it.