1. You never close the door when you pee.
2. You've lost track of the number of times you've seen each other naked.
3. You're not embarrassed to talk about bodily functions with each other.
4. When you hang out, you probably just sit on the couch and do nothing.
5. You know the intimate details of each other's sex lives.
6. You act as a human WebMD for each other.
7. You trust them with your ugliest photos.
"Want to have a how-many-chins-can-we-make contest?"
8. You're totally open with them about the crazy shit you do.
9. You know each other's passwords for everything.
10. You help each other out with those hard-to-reach pimples.
11. You pluck each other's eyebrows.
12. You know their allergies.
13. You aren't afraid to call them out on embarrassing things.
14. You definitely fart in front of each other.
15. You might even know when they start their cycle.
16. And you've probably slept in the same bed too many times to count.
