Nick and Amy were married for years with no idea of what the other was capable of. While you dont want to wake up one day to discover that your mate is a psychopathic killer, certain secrets are healthy. Your mate might not tell you the details about her crazy college years or her old boyfriends that she knows youd be jealous of. Some things are just better left unsaid. Everyone has done things that they arent proud of, so you can't claim that someone is a bad person for keeping some small things from their partner. Its impossible to spill every detail of their life, anyway.