At first, my mouth feels warm and dry; then, as the droplets in the smoke settle, I can make out the particular flavours. The lemon tart is zingy and fresh. Next, a whaf of tarte tatin fills my mouth with caramel.

It might sound mad, but ‘whaffing’ is ­predicted to be the futuristic way of eating. That’s why I’ve travelled to Paris to try one of only two Whaf machines in the world.

Best of all, each breath (or ‘whaf’) ­contains hardly any calories — so you can have as much as you like without gaining weight.