Let’s face it: Chances are if you’re a "How I Met Your Mother" fan, your best friend is too. What else would you base your friendship on? And who would be better to describe your relationship with your best friend than Barney Stinson himself?

1. Your best friend says something is impossible.

2. Puns, awesome stories, or just because. All of these are valid reasons for a "phone-five."

It just so happens that your best friend is the only one who can do it and not feel weird:

3. One of you goes on a first date and is so-so about how it turns out.

There may only be one deciding factor on whether or not there's a second date:

4. You two likely have this gesture coordinated down to a T:

5. Yes, their fries look extremely delicious. Yes, they have an entire plate of them.

However, under no circumstances should you even think about trying to take one:

6. Your nights together almost always start like this:

7. And end like this easily 75.8 percent of the time:

8. Even if you just go a day without talking to the other, something will feel off until you send them a text:

9. And even though you two may get in fights that escalate to points like this:

10. At the end of the day, you'll always be there for each other.

And that in itself is: