quantifiable taste characteristics (like bitter, sweet, salty or sour) that can be perceived and measured as low, moderate or high—such as measuring the sweetness of honey or the saltiness of oysters. Flavors, such as butterscotch, char and strawberry, are more personal and can't be quantifiable. Flavors are either perceived to be present or not. The perception of flavors is linked to our sense of smell, while tastes come from the sensory glands of the taste buds. Though individual sensitivity to the different taste "senses" can vary, wine experts will often recommend pairings based on these more objective measurements rather than the more subjective concept of "flavors". In wine there are three basic tastes-bitter, sweet and sour. These three tastes can each be identified with a primary component of the wine-tannins (bitter), residual sugar (sweet) and acidity (sour). A fourth component, alcohol, is identified in wine tasting with a perception of "heat" or hotness in the back of the mouth and is the primary factor influencing the body of the wine. The residual heat of the alcohol can be considered in food pairing with some ingredients minimizing the heat of the wine while some will accentuate it. Acidity Acidity is a dominant player in any food and wine pairing due to the pronounced and complex ways that it can heighten the perception of flavors. In wine tasting, acidity is perceived by a mouth watering response by the salivary glands. This mouth watering can also serve to stimulate the appetite. In wine there are three main acids that have their own associated flavors-malic (green apples), lactic (milky) and tartaric (bitter). In dishes that are fatty, oily, rich or salty, acidity in wine can "cut" (or standout and contrast) through the heaviness and be a refreshing change of pace on the palate. In cooking, acidity is often used in similar fashions such as a lemon wedges with a briny seafood dish such as oysters. The acidity of the lemon juices can make the oysters seem less briny. A wine that is less tart than the dish it is served with will taste thin and weak. A wine that comes across as "too tart" on its own may seem softer when paired with an acidic and tart dish. The complementing "tartness" of the food and wine cancels each other out and allows the other components (fruit of the wine, other flavors of the food)