Has anybody noticed that - whether as interviewee, part of a featured group or just in the crowd - whenever somebody you know is involved in a TV programme, if that somebody (especially if it is yourself) is middle-aged and somewhat overweight the cameraman focuses forever on the wrinkles, the double chin or the fact that you are lounging back in your seat with your knees apart; wheareas, if your friend or relative is clearly the most beautiful and most talented person there, the camera skims over them at lightning speed, cutting away before you have even had a chance to say to yourself "That's my girl!" or "That's my boy!"?