Lies and theft.

Why do people lie and steal form pepople. Especially when the person is really close to you. Like i just dont get how a person can lie to you for so long about something thats not even worth the after affect's. Its so amazing that they can have the heart to do something conniving and hurtful to someone that they "love". It's one thing to steal from a person and not get caught. But when you get caught and try to lie about it and try to argue the down the person that you stole from and try to make them believe you. And then when you finally cave and tell the truth you try to make up excuses and try to justifie why they did what the did. And nine times its not a good enough reason why they had to still from you. I mean like if they stole from you to save somebodys life there's no way you can get mad, but when they say its because they need something. No, its not gonna happen.