I am bipolar but I had a friend that had some emotional/mental problem where his responses to questions and situations were totally inappropriate. Laughing at things not funny, unconcerned about things potentially harmful or fatal to others, uncontrollable behavior with alcohol and drugs, saying things by rote "I'm sorry, I didn't mean to, I love you, etc." with little or no emotion. I looked up sociopath but none of the other behaviors fit at all. What was his problem? Thanks