Doing behavioral experiments with rodent animals is peace and happy, these cute creatures always surprise me. Somehow we know each other’s “feeling”,happy or not. I can cover up my feelings from my peers and boss; however, animals can detect it with their amazing instinct. Animals teach me that being straight is the best living strategy. And I came to know that how is similar on the issue of emotion expression and emotion communication between human being and other mammal animals. Animal studies investigating the emotion mechanism of animals, are thus applicable to understanding emotional  processing in the human brain.