Male chopsticks are a kind of chopsticks specially used for holding vegetables. They are public chopsticks, which are designed for health problems. It's not usually used to eat in the mouth. In formal dining occasions, the waiter will distribute chopsticks according to the number of people. Generally, everyone has two pairs, a pair of public chopsticks and a pair of private chopsticks, which are used for feeding and eating respectively.
If the restaurant does not distribute chopsticks according to the number of people, but according to the types of dishes, it means that the public chopsticks are only used to add dishes to this dish. When using public chopsticks to pick up food, you can use it to pick up other people's or your own food, but you can't put public chopsticks in your mouth.
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Chopsticks originated in China, which is one of the symbols of China's food culture, while public chopsticks also originated in China. Both eating together and using public chopsticks have a long history in China.
As early as the Xia and Shang Dynasties, China had a separate dining system. In the famous ancient paintings "Feast and Dance View", "Han Dynasty Mural of Dahuting in Mi County, Henan Province" and "Han Xizai's Night Banquet", we can all see the "dining system": sitting on the floor and eating separately.
In the Zhou Dynasty, which attached importance to etiquette, the dining system had already carried the purpose of moral education. China's "separate meal system+public chopsticks and spoons" has a much longer history than the "combined meal system".