"A schoolteacher would have been very gratifying, I'm sure. There are millions of things you would have loved to have done, a politician, a journalist... I thought of being a journalist once... Everyone wants to have done more things in their lives. It is a slightly intellectually undemanding thing to do, being a rock singer, but, you know, you make the best of it." The Rolling Stones frontman Sir Mick Jagger contemplates other careers he could have had outside the band.