Why Do We Make These Decisions?

There are tons of things that you, me, and everyone for that matter, do on a daily basis that really have nothing to do with whether we've deemed it to be morally justifiable. We don't go around faced with decision points in our lives and then instantly start talking to ourselves about what the right thing to do is. This is not how most of us make these little decisions in our but an interesting question to ask,. why is there a distinction there, and why is that the case?