Literotica is one of the oldest web sites devoted to erotic literature, both with plot and without. Started in 1998, it is now home to close to a quarter of a million individual pieces of written fiction. It's the "America Online" of porn stories in that most people start there, some never leave, and lots of them are idiots.
Content is user-submitted and screened by the site's hard-working administrators, Laurel & Manu; only three things are hard rejects: underage participants, bestiality, and excessive gruesomeness. This has more to do with liability than censorship; as the largest and most visible erotic-literature website on the Internet, Literotica will be the first target on the list the next time a Moral Guardian starts an anti-smut crusade. So they'd rather be safe rather than sorry. (There are other websites out there if you want to reador publish!things Literotica won't touch, but some people have gone for years without figuring that out.)