White lie is not always bad. It is an unimportant lie, especially one told to be tactful or polite. If a guy tells his girlfriend that her new haircut looks great when it is horrible, she will know he is lying. It is better to tell the truth in this case. However, if his girlfriend has new dress and she really likes it, he should always say it is lovely. If he says he does not like it, he will make her unhappy and angry with him. Thus, people can lie if the truth will hurt someone and it is not important.