OK, the usual instructions to the barber is: shave it off, number one. But lately I have been thinking I should have a change. Last time I got it cut rather than shaved, and I now have some hair (rather than stubble on my head) for the first time in years. What d'ya think I should do? I have a certain sophisticated "salt and pepper" thing going on Should I make an effort? Would George Clooney feel threatened?