David Blunkett asked Tony Blair and John Prescott to take his dog for a walk while he had his hair cut. Blair and Prescott decided to call in at a pub and have a drink. While they were drinking a man walked up to Blunkett's dog and lifted it's tail. Blair said to the man ''What on earth are you doing''. To which the man replied, ''A chap outside said a dog had come into this pub with two arse-holes''.