Let's think about the Yin and Yang of tastes.
Sweet, sour and spicy hot belong to Yin taste.
Salty and bitter belong to Yang taste.

Yin taste loosens up your body.
Yang taste tightens up your body.

When you feel tense, if you take something sweet, you can feel relaxed.
When you cough because your bronchioles are tightened up, drink a glass of water with some drops of vinegar, and you will ease the cough.

You need to be careful about the spicy hot taste, because most people think it warms up the body.

Yes, spicy hot taste temporarily warms up the body, but after that, it chills the body. Spicy hot is good to take in the summer, but if you take it a lot in the winter, it will be a cause of coldness in your body, resulting in various kinds of disease. That is why spicy food is usually eaten in hot countries. Korea is not a hot country, but Korean people eat a lot of spicy food; for example, Kimchee. Before red pepper was sent to Korea from Japan, their Kimchee was not hot. Since they started eating a lot of spicy food, it is said that Korean women have had a lot of gynecological diseases, because it makes their body cold.

I will talk about Yang taste in the next volume.