So Fathers Day has been and gone, as has the summer equinox, Ali G, Ed Milliband, the new years resolution diet and the Hobbit films.  Yet despite the sure but cyclical nature of events, weather, celebrations and the fickle and unpredictable nature of popular culture; what remains a constant source of amusement, a pick me up when times are tough and life is lack lustre, is the cornerstone of comedy, that silly slap in the face, the witty one-liner.…