Scents determine our lives, as the well-known gastronomy and wine expert Guy Bonnefoit writes in his book "Fascination Wine & Aromas": The human skin has a surface area of about two square metres and has up to 300 olfactory components. Depending on the physical condition and state of mind, the olfactory substances also change. A dog can distinguish precisely between people who are well-disposed towards it and those who are anxious towards it. Every mood has its own smell - thus one can smell the state "happy". An experienced country doctor reports that he is able to recognise certain illnesses when entering a sickroom. Each disease develops its own typical "scent". Diabetes smells fruity, diphtheria sweetish, typhoid like baked bread and gout like a lion's cage or a pet shop.