"Food", people's most basic need is food and clothing, so the desire for satiety is certainly beyond doubt. Once you are hungry, you can't do anything well. My father likes to talk about the great famine in the late fifties and early sixties, and about eating grass roots and bark at that time. He said that whether it is day or night, I lie down whenever I have time, not because I am lazy, but because I am afraid of wasting my strength. Lying down to sleep is the most terrible thing. When you are hungry at night, you get up and drink cold water, but if you drink too much water, you will want to go to the toilet and feel bloated all over. The pursuit of food is the most basic nature of animals.
"Color", here color does not refer to lewdness or pornography, but refers to sex between men and women. In ancient times, sexual openness was far from enough. With the strengthening of centralization, people's ideological control was gradually suppressed. Gao Zi pointed out that sex between men and women is also a kind of nature. In fact, sex is essential for any animal. Sex means many things, but the most important and fundamental thing is that sex means reproduction, generation after generation, and endless life.
No matter what animals, advanced or inferior, breast-feeding or non-breast-feeding, sex is a very important part of their lives, because if there is no sex, there will be no offspring, or maybe there will be no them at all.
This should have been bold at that time, and even today, it is worth our deep thinking. Especially in today's China, where sex has become pale, society and family are far from enough to educate the new generation about sex.