codliver vs. cod liver

You know how you can go through your whole life thinking something means one thing and then suddenly realize in a flash that you've completely missed the point.

Here is an example... my whole life I've heard now and then about "Codliver Oil"... it isn't something that I was ever burdened with tasting or using... but it was a term that reminded me of stories my grandmother would tell or from old movies and books. The interesting thing is that I don't recall ever actually reading about it... only hearing about it. So, for my entire life (until yesterday) I thought of Codliver as one word and did not relate it to anything other than Oil of that name. I thought of Codliver Oil as just some kind of abstract oil ..... like vegetable Oil... for some weird reason that I still don't quite understand, I never made the connection between Codliver Oil and Fish Oil... much less between Codliver Oil and Cod. Yesterday I was watching a movie and in one scene there was a bottle of Cod Liver Oil on a shelf (set dressing) and this huge light-bulb turned on over my head and I said (out loud in my empty save for me house) "OH - Cod Liver Oil... it comes from the Liver of a Cod! DUH! YUCK!" Then, I realized how completely ridiculous it was that I never made that connection and I couldn't stop laughing (note to self - try not to laugh when sick... it doesn't make the throat feel any better).

So - I have to wonder (like one of the kids in the Big Picuture who wondered what he was always rushing too and what he had missed seeing in all his rush) - what other obvious connections have I missed? What other assumptions have I made about things and then filed those assumptions away and stopped questioning?