Wine tasting is more of an art than most people realize.
Expert wine tasters seldom really taste the wine.
They first check the color by holding a glass of wine against the light, then swirl it to observe the quality of the froth, and finally inhale the bouquet.
Only if some doubt remains regarding the quality of the wine do they actually sample it by tasting.
It is in the final test that most a amateur wine tasters would fail, for the expert tasters merly uses the tongue and the roof of the mouth, never swalling.