Things My Parents Had Never Heard Of

Parents seem to live in this strange, funny world where they have a magic pop culture filter. These are things that my parents had never heard of until I mentioned/explained them:

1. Hipsters
2. Ryan Reynolds
3. The song "Hey Ya"
4. Twitter
5. Tosh.0
6. "The Book of Mormon"
7. Louboutins
8. "Arrested Development"
9. Pajama Jeans
10. Keyboard Cat

You get the idea. I wonder at what age the filter kicks in and if i can get mine early (except for Ryan Reynolds, of course).