http://www.huffingtonpost.com/2013/0...n_2544864.html
It's also on a few other news sites, it was in his VH1 behind the music documentary too how he dodged the draft on a mental disorder.
From a 2012 interview about it: I got my physical notice 30 days prior to. Well, on that day I ceased cleansing my body. No more brushing my teeth, no more washing my hair, no baths, no soap, no water. Thirty days of debris build. I stopped shavin’ and I was 18, had a little scraggly beard, really looked like a hippie. I had long hair, and it started gettin’ kinky, matted up. Then two weeks before, I stopped eating any food with nutritional value. I just had chips, Pepsi, beer - stuff I never touched - ... little jars of Polish sausages, and I’d drink the syrup, I was this side of death, Then a week before, I stopped going to the bathroom. I did it in my pants. poop, piss the whole shot. My pants got crusted up.