Eunuchs, a special "species", are called pigs and sheep mainly because both of them will be castrated. Having said that, I have to say a special profession: castration. Netizens in rural areas should know that when raising pigs or sheep at home as a child, there were special personnel to castrate pigs and sheep. Moreover, these people walked around the village with knives and tools, shouting slogans: Choose pigs to cut sheep. Specializing in castrating pigs and sheep is also a profession, and this profession belongs to the royal family and has a certain sense of superiority.