The ALA recommends sites to kids that are pornographic. The Go Ask ALice which ALA links kids to, discusses 'safe' rimming, fisting and many other inappropriate topics.
The page says it was begun for college students, and now serves students of high school and college ages, and young adults.
I read a bit of it, and while it does deal with a number of sexual topics - including alternatives to actually "having sex", I'm not sure I'd classify it as pornographic. I think that one problem people here would have with the site attempts to be "non-judgemental" and most of us would prefer more morality thrown in.
I don't know that the site is any more graphic than what the kids discuss among themselves, however, and at least it seems factual.