Erotic literature is the oldest form of smut known to man. It was porn before porn was invented. Dating back to the days of Ancient Greece, epic erotic poems were primarily how people used to get their fap on. Well, in between having gay butt sex with one another, of course (look it up, it was a totally common activity in Ancient Greece).
Erotic lit has survived throughout the ages, though, and is still a popular form of smut even in today’s day and age. That’s right, believe it or not, even with billions upon billions of videos of the world’s hottest women getting fucked in any and every way imaginable at our instant disposal with nothing more than the click of a mouse, some people still prefer to read their porn.