Understanding animals

For all kinds of animals, they reflect their emotions their own unique action and way. For example, dogs wag their tails when they are happy. Cows throw up their tails from pleasure. A deep grunt of satisfaction uttered by pigs indicates pleasure with its food. Cats stand at full height with arched backs when they are terrified.

Of cause, reflecting of emotions includes human too. Smiling, frowning, tearing, etc are not alien actions at all. However, there is a difference between human and animals in reflecting emotions. Animals do not hide their emotions. They reflect all emotions without conserving. Humans hide their emotions; sometimes even lie about how they feel. This makes us the most complex living thing. This, makes us the most difficult to understand.