Chocolate: unless you rank among the rare creatures who don’t like it, it’s safe to assume you have already enjoyed part of your weekly share. If you’re reading this in Ireland, Germany or Switzerland, this would amount to about 200g (people with chocolate allergies and those on a diet will excuse me). Even for those who don’t have much of a sweet tooth, chocolate is a given, an obvious fact of life, together with other exotic yet very familiar goods like coffee or tea.