**** drinkers swirl their **** glasses for this releases some of the scents that the **** is made of during fermentation. Swirling helps the tannins of the **** be released which in part helps the **** taste better, whether sweet, sour, or dry. There is a lot of chemistry to **** making and the first thing that happens is the grapes are crushed into what is called a must and the chemical process of the sugars and the yeasts on the skins of the grapes. It also depends if the **** is made with the skins of the grapes or not for there are white wines that are made from skinless grapes. If the **** drinkers drink even stronger **** then it depends on the distillation of the alcohol. All of this is all about making a good glass of **** that tastes good and smells good.