In nature, there is one animal that sheds tears when it eats, and that is the crocodile. This may seem strange, but it's a natural physiological response of crocodiles.
When crocodiles hunt and eat their prey, the salt content in their bodies increases. Since crocodiles' kidneys are not functionally able to excrete excess salt through urine like humans, they will excrete these excess salts from their bodies through tears to maintain the balance of salt in their bodies. This is a natural physiological phenomenon that crocodiles have produced in order to survive in the long process of evolution.
In addition, tears have another effect, which is to moisturize the eyes. Crocodiles need to keep their eyes open when eating, and tearing can help crocodiles keep their eyes moist and prevent them from drying out.
Therefore, when we see crocodiles crying when they eat, it is not because they are sad, but because it is a physiological need. It's a way for them to survive and a wonderful phenomenon in nature. We should respect and protect these animals, but also respect and understand the laws of nature.