Do you know the story of crocodile tears? According to ancient Western legends, crocodiles are both ferocious and cruel, as well as cunning and cunning. When it peeks at people, livestock, animals, fish and other predators, it will often shed tears first and show compassion for others. This will make you paralyzed by the illusion and lose vigilance to its sudden attack, and you will be violently devoured by it without any precautions. Another theory is that after a crocodile catches its prey, it will cry hypocritically while devouring it greedily. In short, this phrase refers to false tears and disguised sympathy. Then it was conventionally extended to satirize those insidious and cunning people who hurt others while pretending to be compassionate and kind. Therefore, it is generally said that "crocodile tears fake mercy".
In fact, the crocodile is not sad at all, but is lubricating its eyes. When the crocodile dives into the water, the nictitating membrane in the crocodile's eyes closes, which can not only see the underwater situation clearly, but also protect the eyes; when the crocodile is on land, the nictitating membrane is used to moisten the eyes, and this requires the use of tears to lubricate.
When crocodiles hunt animals and eat them, the salt content in their bodies will increase. Therefore, crocodiles shed tears to eliminate these salts and keep the salt content in their bodies at a stable level. This is the effect of his evolution over millions of years, so the crocodile sheds tears not because he is sad, but because he has to do it to survive. On the other hand, as mentioned above, it also lubricates his eyes.
