Imagine you're a police officer, and you're attempting to establish whether there have been witnesses to a crime. We've all seen Identikit pictures of suspects on the news, and they look nothing like a real person. Often they look like a Muppet. And when the suspect is black or Asian, often the different parts of their Identikit face are slightly different colours, adding insult to injury. However - apparently there has been extensive research into how people recognise a face in a picture, and the quickest and easiest way to jog their memory is to show them a picture of somebody famous who resembles the suspect, and ask them if they saw a man who looked like, for instance, Tommy Lee Jones (a scary prospect in itself). Without going into too much scientific detail, it's mainly because our memory of a face is as a whole, and breaking it down feature by feature is far harder to do. Fascinating, no? And something I've been doing as far back as I can remember. Whenever someone tells me about a new boy/girlfriend my first question is always "Who would play them in a film?" - obviously you have to make allowances for the fact that leurve can vastly improve the looks of a potential suitor but if they say "Ooh maybe Hugh Jackman...?" I can assume it's some man who is tall, smiley, and quite good-looking (and possibly Australian). One of the best drunken dinner-party conversations I've ever had was when we were all deciding who would play us in the films that would inevitably be made of our lives - Philip Seymour Hoffman loomed large (not playing me, obviously, but as my friend Marky Mark), although my friend Steak and I nearly came to blows over who got Laura Linney. I fobbed her off with Mena Suvari (well, Steak does look about 15). Everyone tried to make Mr Fishwife feel better about his comprehensively (and prematurely) grey hair by saying "Well, obviously George Clooney". And all at once I was reminded, depressingly, of the colleague I once had (who, himself, looked like Hugh Grant in About A Boy) who considered the idea for a while and then finally decided I looked most like Axl Rose.