One of the few common rules in academic art practice is no bodily fluids. Contemporary artwork, however thematically challenging, typically works in media that didn't come from a human body. But this was not always the case. Many cultures have blurred the line between art, ritual and entombment by painting in blood or ensconcing human remains in ornate reliquaries. And even contemporary western art has its rule-breakers, like street artist and heroin addict Richard Hambleton, who used blood from his used needles to create otherworldly landscapes.