Why do plays about sex and violence written by women still shock?
As audience members are escorted from the latest revival of Sarah Kane's play Cleansed in London this week after fainting in the aisles, is there more at play than just weak stomachs?There is a moment, around 20 minutes into Sarah Kane's play Cleansed, when, without great fanfare, the brutality commences: "Tinker produces a large pair of scissors and cuts off Carl's tongue," read the stage directions. "Carl waves his…