Stuff I Don't Get

Suggestions and answers welcome!
  1. Dark matter and antimatter
    I've watched a lot of "Cosmos" and still have questions.
  2. Coconut milk vs coconut water
    How are they differently made/extracted? How is one like a fancy water and the other a decadent (possibly healthy?) thick substance that sometimes comes in a can?
  3. How Chris Brown is still played on the radio
    Nope.
  4. Exercising everyday
    Everyday? What if you have plans?
  5. Related: "forgetting" to eat
    Never forget.
  6. This thing my dad texted me
    It's definitely a vagina, right?