gg allin was a legend when I was a kid in art school. His "shows" consisted of him mostly nude, shoving a banana up his ass, as well as defecating on the stage and throwing it at the audience. Check out "GG Allin HATED"
That documentary came out in the 90s, and he went from way underground obscurity to hipster hero/joke combination overnight. One of my favourite alternative video stores used to sell GG Allin dolls, the packaging of which invited you to piss, shit on, and physically abuse them. Yikes. I'd wager a good chunk of people who own Allin shirts don't own any of his music- the legend alone is sufficient.