What draws us towards a shop window display? What drives us to grab a special offer, to enter the privileged circle of premium newspaper subscribers, to peruse the pages of an enticing magazine? Without doubt, it is curiosity - that essential force of everyday action which invites us to break from our habits and to become transported beyond our very selves. Curiosity (whether healthy or unhealthy) is one of the favourite tricks of market seduction. Capturing a public - attracting the attention of a reader, seducing a customer, meeting the expectations of a user, persuading a voter ... - often...