text: If we are happy, surprice, angry, disgust, fear and sad other people can seen by looking at our face. But some people can control their felling so sometime it hard to know their expression. Sometime it is good to know how people think about us but sometime not knowing what other pwople thik about us better. Some people can't tell other people emotion by looking at their face. Most human communication doesn't have emotion. They talked to each other because they think they have to.