Sometimes I think freaks are having fun on the fringe. Other times, well, I think they're just too dumb to come in out of the cultural rain:

Upon further questioning, the patient said that approximately 4 hrs earlier he and his boyfriend had been "fooling around." After stirring a batch of concrete mix, the patient laid on his back with his feet against the wall at a 45-degree angle while his boyfriend poured the mixture through a funnel into his rectum. After the concrete mass hardened, it became so painful that he sought medical care.

And you thought that picture of the guy with a mason jar in his butt was impressive...

Site has one abstract art picture of a perfect concrete cast of a colon, and another of an x-ray of said object in-situ. I guess you'd call it safe for work, if not safe for the imagination.