Richard Herring, Pleasance Above, Edinburgh
Pleasance Above, Edinburgh"This show," runs the warning at the start of Richard Herring's new set, Talking Cock, "may contain knob gags." Oh, just a few. The knob gag is notoriously the easiest laugh a comedian can get, making this show potentially the cheapest piece of fringe prurience at Edinburgh. In fact, it seems to have been created so that the knob gag may never again be complacently cracke…