Things I don't understand

Running list..updated mainly during school year.
  1. Guys
  2. People who judge others for wearing makeup
  3. People who judge others for the food they eat
  4. What "collated" means in printing
  5. Life
  6. Dog people vs cat people
  7. How parrots work
  8. Why I love the Founding Fathers even though I know I should have some issue with them..