1. You nap together.

Whether you both fall asleep watching Netflix on separate couches or in the same bed, it's never awkward when you wake up together.

2. You binge watch shows together.

Depending on the mood you're in will dictate whether you watch Skin Wars, Bob's Burgers, or The Office. But no matter what, you never EVER watch an episode without each other.

3. You share food.

Yes, I want your left overs. Yes, I want In-N-Out. Yes, I will eat your last slice of pizza. Yes, you can have some of my Dorito's. Yes, you can use some of my milk to make chocolate cake as long as I can have a slice.

4. They've seen your butt...

While you're in the middle of changing, or you ran to the bathroom in your underwear, they now know all about the tiny birthmark shaped like a peanut on your hiney.

5....And you've seen theres.

What's that expression? 'Tit-for-tat'? 'Show me yours and I'll show you mine'?

6. You can communicate through sounds.

A scream, a whine, or a groan, you know exactly what the other is thinking when they make that noise.

7. There is no such thing as 'boundaries'.

No personal space, no privacy, you've even napped in each other's beds. Boundaries do not exist in your house hold.

8. You tag them in everything.

Because it's so much easier than getting up, walking across the room, and showing them something funny you found on Instagram.

9.You always say 'I love you' when you leave each other.

And "I'll miss you" is also included in that sentence.

10. And no matter how much time you spend together, you always get excited when you see each other at the end of the day.

Even if you saw the other literally five hours before, you'll still get excited when you get to hang out with them.