Xbooru.com is a fucking mystery even for the kind of depraved son of a bitch who would associate with a guy like me. The site has been around for almost a decade and has had 154,445,334 visitors so far, according to the front-page counter. You'd never guess that from the outside, because it's hard to tell exactly what the site is all about. Is it hentai, amateur photos, or something else?