Lying... depending on what the lie is depends on if it is bad or not. Lying can be a better way to communicate with your friends if they asked you something and you didnt want to tell the truth because it may hurt them, on the other hand if you lie to your friends all the time this will make the relationship bad. If the lie is not mean to hurt someone it isnt a bad lie. Lying to children about father christmas, the toothfairy and the easter bunny is a good lie as it makes them enjoy their childhood more.
