But what do lemons have to do with technology? A lemon fresh from the tree has a rough skin. The better the tree has been cared for, the rougher it is. It's a strange roughness, because if you squeeze a little, a perfumed oil comes out and makes the skin suddenly smooth to the touch. And then there's that wonderful sour juice, so good on fish and oysters, in summertime drinks and in a hot cup of tea! Touch, scent, taste. Three of the five senses cannot be transmitted through technology. Three-fifths of reality, sixty per cent.