WOOKIES AND AGING

Again, no spoilers.
  1. Chewie hasn't aged a bit.
  2. Wookies don't even go grey.
  3. Are we like dogs to them?
  4. We age 7 years for every 1 of their years?
  5. He was in Episode III, for crying out loud.
  6. Chewie, whatever your skincare regimen is, I want in.
  7. That's all I got.
  8. *UPDATE* he's ~250 years old.
  9. Rock on, Wookie.