Years ago I saw a webm of what seemed to be a very bizzare fetish/art video. there was a dark skinned man, tied up in what i remember as an industrial setting, his anus was inside out, it was bloated and gross and there were some type of strings hanging from inside it. there was a spinning stone wheel, i remember it as maybe a mill stone. the guy had an erection, and he kept trying to lift himself up so that the tip of his dick would touch the spinning wheel. at the end of the video he was cumming from the wheel grinding against his penis. the picture is best i could do from what i remember of the video.