First off, how freaking cute that he asks you what you wrote about!! Swooning over that little middle schooler! ;)
Just one more thing that stems from childhood. Here I thought I was the only person that did this and I never talk about it because.... you know. It's definitely different.
Every single time my girls leave the house I picture something horrible. I hate it. I have often imagined someone plowing into my car or accidentally doing the same to someone else.
And yes, our parents were victims of the trauma, so were we, but we can always be better to our kids... which you are doing. Look how sweet your son is, that says a lot!