Advertising has always been a huge unrecognised source of outdoor relief for the arts.

In the 1940s, cigarettes would be shown in classy situations, endorsed by celebrities - real A-list Hollywood stars in America - the ads would make claims about tobacco quality or manufacturing science and, bizarrely, some brands had what almost amounted to health claims.

The library was one more essential in the parade of rooms in a big 18th-century house - and part of the required kit ever afterwards. The important thing was to have the books, not actually read them.

Selling scent is a key job for celebrities. At any one time, there'll be hundreds of them at it, going on the world's talk shows, doing photo-shoots, providing employment for thousands. Celebrities are instant brands.

All I'm saying is that Louis Vuitton and L'Oreal didn't invent branding at some point in the mid-Eighties. Big, reassuring names have been around a long time.

Have you got a Beemer, an Audi, a Saab or a Volvo that replaced a Ford, Vauxhall, Rover or Nissan? Many Brits have. Your first Beemer. A particularly nice smell of leather. Something rather plain but satisfactory about the interior. And that lovely enamel wotsit in the middle of the steering wheel. A moment of quiet 'because I'm worth it' pride.

Nobody knows anything. I deal with people in all walks of life, some of whom should have some idea of what they're doing. And they're all clueless. It's astonishing that any bridges stay up, or that planes don't constantly plummet from the sky. It's heartening, in a strange way.