1. Both very hairy
  2. Both larger than average
  3. Both shed all over the place
  4. Both really into drinking water
  5. Both awake at weird hours of the day
  6. Both known to freak out over nothing
  7. Both v. particular about who touches us
  8. Both motivated by food and toys
  9. Both enjoy paper
    One of us likes to draw on it and the other one likes to eat it
  10. Both simultaneously crave attention and want you to leave us alone
  11. Both feminists (I assume)