1. They not only will tell you when you have something in your tooth, they will pick it out for you if you're unsuccessful.
  2. Bonus, they'll pick food out of your hair and off your clothes. (This frequently happens to me at work.)
  3. You can be mid conversation and feel free to pee while still on the phone, flush and all!
  4. You're at their house, they drop food on the floor, you pick it up and toss it back in the bowl. No questions asked.
  5. They will tell you when you've wiped your flour hands on your ass, and help you clean up.
  6. You ask them "Do I look fat in this?", and they answer you honestly.