It is really dirty. Both literally and figuratively. Think Danish rainy weather/sweating sun, mud/dust, no showering for most people, things like dancing and rolling in the mud, sometimes waste floods over... And then there's the constant drinking, soft drugs, the Danish festival mindset of sharing everything with everyone, even if that be joy, insanity, bodily or regular fluids. Both me and my girlfriend got ill. We hooked up with so many people that I don't have count. Sometimes with the same person. And then there's the concerts and the food...
I miss it, but on the other hand, I really need a couple of days in bed to relax and get better.
Tøs-orgiefestivalen sounds very dirty, yes, but I'd beg to note that Roskilde is very dirty, and quite wild. It's at least dirtier than the average day. Haven't tried any other festivals though.