Conversation so far:
What are the most common spices used in cooking?
The infographic above shows that, surprisingly, cumin is the most popular spice in the world, and coriander (or cilantro) is the most commonly used herb. In Europe and Africa, garlic is the most common among all dishes considered, and—no surprises here—oregano is common in the Mediterranean regions.
How are spices different from herbs?
Herbs and Spices come from Different parts of the plantAn herb is the green, leafy part of the plant. A spice can come from the root, stem, seed, fruit, flower or bark of the tree or plant.

Question: Why do spices taste good?
Self-contained rewrite: Why do spices taste good?