2 Girls 1 Cup is possibly the most disgusting thing on the internet. Now I'll admit there are a lot of gross things online but I've yet to encounter anything more revolting than the misadventures of two girls who literally eat shit and puke trying. The website, (http://www.2girls1cup.com/), is host to the video (viewer discretion advised, seriously), as well as a number of videos of people's reactions to watching the scat porn.
While I'm sure footage like this could give rise to a great number of introspective sociological queries, it's really just gross. Don't watch it. With that said, now you probably have to.