Donuel's earlier comment has got me thinking about those strange gaps in languages where there ought to be a word, but it is either so rare few people know it, or it doesn't exist at all.

A couple of years back I went on a short evening course of wine appreciations (2h a week for 8 weeks). This was given by a woman who used to be a sommelier at the Dorchester in London and was born and raised in the Champagne area of France. It soon became obvious at that (and a follow-on one matching wine to food) that she had a intense awareness of taste in the way some people do with colour. It is, if you like, the opposite of anosmia. But is there such a word? And while wine appreciation is primarily taste, the smell and colour are also involved, as are many senses that are not included in the classical five. So what word to describe this? 'Sensual' is perhaps closest in the strict sense, but clearly that word is not used, really, for anything to do with senses...