I apologize in advance, I simply don't have it in me today to address this properly. I am far too cranky and frankly I just don't care. I would rather go to bed and yes, it is only 7:38.
To answer the question though; I realized my home was different than other homes as a young kid. I think most children inherently know that things are different in other families, different rules, food, smells, clothes, traditions, etc. It isn't rocket science.
Maybe you should come up with a better question, Catherine. Or maybe I should come up with a better mood.