When I want to emphasize the falsity of human experiences, saying: "Pour crocodile tears". Indeed, from the crocodile's eyes are constantly pouring tears. There is an ancient legend that crocodiles weep bitter tears, eating man.
In fact, the crocodile is crying not from pity for his victim and not with shame. This phenomenon has a scientific explanation. The fact that the kidneys of the animal imperfect, therefore, to remove from the body of excess salts it has special glands near the eyes. When these glands work, it seems that the predator is crying!
And emotions in reptiles do not. So to mourn crocodiles can't...