My grandfather never talked about high school, it never occured to me it was because he didn't get to go. I learned when I hurt his feelings by badgering him about which high school he went to.
I didn't know what I was smelling at the middle school bus stop!
There is a lot of songs over time I have learned the true meaning of. 
I didn't realize my Calculus teacher was gay. He referred to his partner "bob" (or some male name), I thought they had a side business. A couple years later then wandered hand in hand into my work. 
I was totally clueless that someone in my husband's family was a meth addict and often high. I just thought they were quirky.
I am usually quite dense though, I am used to it.
Amanda
2011 Specialized Epic Comp 29er | Specialized Phenom | "Marie Laveau"
2007 Cannondale Synapse Carbon Road | Selle Italia Lady Gel Flow | "Miranda"
You don't have to be great to get started, but you do have to get started to be great. -Lee J. Colan