1. Some people can see on top of the refrigerator.
    All of my life I've never been able to naturally see there, some absolutely never occurred to me that others could. In my mind, the top of the fridge is when people hide things. I was well into my 30s when I realized all of this.
  2. I once asked my mom what "those white things were in the middle of the road." She responded "cigarettes."
    They were lane reflectors, but I didn't hear them referred to until I was in my mid-20s. I still call them cigarettes to this day.
  3. Great Grandma didn't care that much
    When I was in preschool and kindergarten, I spent mornings with my great-grandparents. My great-grandma taught me how to crochet a chain. Every day she would pull out a ball of cotton, and asked me if I wanted to crochet and when I finished, it was time to take a nap. For years I thought that somewhere in the house she had hundreds of balls of rudimentary crochet done by a 4 and 5 year old. I was an adult before I realized she just un-raveled the whole thing every day while I slept.
  4. Handicapped toilet stalls have taller toilets.
    I'm 5'2" and only realized I couldn't touch the ground in my late 20s. Now I wait.