PX is a unique Spanish sweet wine that I discovered a while ago, so sweet in fact that it resulted in me having to make a trip to the dentist. PX, or Pedro, short for Pedro Ximénez, is one of the darkest, richest, stickiest wines in the world and by rights shouldn't exist as a wine at all. Oozing with viscous sucrosity, it's the perfect blending sweetener, in small doses, for cream sherry and sweet oloroso. Did someone dunk a finger in a cask of Pedro one day and think "I could get a pat on the back from the mouthwash industry for bottling this on its own"?