We have always known that telling lies is wrong, but with the gradual process of growth, no one can always choose to say all the truth in life. Lies for us, what does that mean? Is it a cover? Escape? Or a poor self-protection? Listen to what psychologists explain it! University of Massachusetts social psychologist Feldman once said: "Human beings are animals that love to tell lies, and the times is more than they realize - an average of 25 times a day at least." 25 times? whether this figure has scared you? We are really so good at lying? If you seize the moment to ask the people around you: normally you always lie? I believe most of the answer is no, but also a lot of people with particular emphasis on " unless it is out of consideration." But the facts? Psychologists agree: in life, everyone does not consciously lie to others, in many cases even not think. Most of the lies are to respond, not to mention whether or not malicious. "Ah another day invite you to have a cup of tea", "I can not come, I’m not feeling well," and so on. These sort of small lies, basically can be classified as necesssity for our daily interaction with others. Where do lies come from? Excluding the special case of malicious professional liars, in daily life, most of the lies we say can be a kind of "instinctive reflex behavior," The most basic purpose is "self-protection." Imagine, when friends are excited to show you a new handbag, will you honestly say, "I think it is very bad?” Lies first of all are from the sense of insecurity. In any unsafe environment, we will choose to say lie or hide the truth to avoid possible injury, various forms of physical or psychological harm in order to safeguard ourselves and others. In most cases, we lie because we fear of losing love, fear of losing each other. Along this idea, we will find: not so much honesty is a virtue, not as good as it is a competence  "can bear the negative consequences". When we grow up, we will not lie for smashing a vase, because we can pay it, without fear of being beat. The boss who are usually careful to meet clients, often criticise their chidren after coming home. But also they rarely worry about the relationship between themselves and their children would be threatened. There is another common lie, its subtext is, "It is none of your business." That happens among unfamiliar social occasions.