Good Sherry is one of the most undervalued wines in the world. And according to Falstaff one of the best aphrodisiacs. Made mostly from Palomino grown on chalky soils, it is important to note that all sherry is white, and until otherwise modified, dry. It is fortified with grape spirit once fermentation is complete and then the choice of whether to make a Fino or Oloroso is made. Generally Finos are derived from the finer wines and Olorosos from the coarser, though that is itself a gross generalisation. If wines need sweetening or colouring then producers turn to Pedro Ximenez, known as PX even in Spain. It carries a higher sugar load than Palomino and makes great sweet wine which can be blended or sold on its own. (CW 23/01/12)