Taste: There is much more to taste than what your tongue can detect. In fact, the tongue is actually quite limited in the range of sensations it can detect. Sweet, Sour, Salt, Bitter, and Umami is the five taste sensation recognised in the western culture. Other than that we can also detect: Dryness, Fattiness, Spiciness, Calcium, Coolness, and Numbness.
Aroma: Your nose on the other hand is capable of detecting hundreds of distinct compounds. Aroma therefore plays an important role in what you experience as 'taste' when you are eating.
When smelling chocolate you should warm it up a little with your fingers, bring it close to your nose and sniff and breath several times - for at least 30 seconds - as the aroma may develop as you smell.
Taste without smell: Now we would like you to do a quick excercise: