If the wine has medium to high acid, it can make your mouth water, often described as "juicy."
Acid: Michael Schuster's "Essential Winetasting" defines the range of wine from flat to biting. If a wine doesn't have much acid, it could be described as "flabby," calling out for lemon the way a fatty fish does. It's flat and isn't perky like a green apple. If the wine has medium to high acid, it can make your mouth water, often described as "juicy." Too much acid might make you wince like sucking on a lemon.