The fact is that odours and flavours are created entirely inside our heads. Think of something delicious – a moist, gooey, warm chocolate brownie fresh from the oven, say. Take a bite and savour the velvety smoothness, the rich heady waft of chocolate that fills your head. Now consider the fact that none of those flavours or aromas actually exist. All that is really going in your mouth is texture and chemicals. It is your brain that reads these scentless, flavourless molecules and vivifies them for your pleasure. Your brownie is sheet music. It is your brain that makes it a symphony. As with
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