I'm sure it is a learned trait when growing up but then when the addiction takes hold they pull into that side and realize they can use it to their advantage. One of the things that irks me is the 'addict behavior' when they are sober. It is so ingrained in them that yes, it must be a trait they had as kids for whatever reason. Something that really needs to be unlearned when sober if they really want to rebuild a healthy life.