Let's eat. What caused the click?

The fundamental reason for slurping is that your lips won't close when you eat. The sound of teeth biting and slurping are two completely different sounds. You can record on your mobile phone to fade the sound of eating potato chips with your lips open and closed. Compare it and listen to it. Some people have the habit of eating their mouths since childhood, and no one corrects them. They have accepted the concepts of eating and mouth since childhood. Subconsciously, they must express their delicious food through their mouths. When eating and chewing, your lips are tightly closed and can be eliminated after eating. Eating with one's mouth open is caused by personal habits and environment, and eating without one's mouth open is also caused by personal habits and environment. Some people may say that there is no time for you to eat slowly. Sometimes some people will lose some important interests related to themselves because of their eating habits, and others will correct them. I have no objection to eating. When people are very hungry, it is inevitable that they will eat quickly. Let it be. Basically, it is caused by the living environment. My lips won't close when I start eating, so I want to eat faster and eat more than others. Later, it became the concept of eating faster and eating better.