What is this book (p.498 pages)? 332) try to discuss about the parts of the question. I’ll copy here just a small phrase. All the rest is there and in my opinion the rest is there too.

I’ve always wondered about the words hot and spicy with reference to the tastes of peppers and other spices. Why do chili peppers have peppery taste? Are the chemicals that cause sensations the same?

No, you know those sensory effects are caused by several different chemical compounds. Are they all linked to one another? If there were some individual descriptive words for these emotions, then what would really happen? Why don’t the words hot, peppery, spicy, zingy, spicy, pungent, piquant, biting, zingy, sharp and zingy all seem to be in similar order? How could there be a different brand of black pepper, chili peppers, ginger, mustard, horseradish and wasabi?

What is the best thing to learn about a person/thing?