Hailey Bieber and Kendall Jenner are beyond besties. They've been friends for almost ten years, and have seen each other through all the ups and downs of their famously scandal-prone families.

In Kendall's own words to Hailey: "We've been there for each other through it all and like not let it get in the way of our friendship, which I think is really like special and important."

The highs and lows are what she and Mrs. Bieber discussed in Hailey's latest vlog. It's part of a 'WHO'S IN MY BATHROOM?' vlog series on Hailey's YouTube channel.

"We could have gone the really typical route, makeup tutorials, skincare video," Hailey explains. "But instead, I wanted us to make mac & cheese in the bathroom."

Believe it or not, it just gets stranger from there.

They Play 'Never Have I Ever'

Kendall Jenner and Hailey Bieber tongue out drink dark club sitting
via Favim.com

To give fans a glimpse into what their friendship is really like, Hailey's video involves about ten minuites of heartfelt convo between the pair while they cook mac & cheese over a hot plate. Eventually the conversation turns into a drinking game.

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The women's game of 'Never Have I Ever' has them taking shots for having guys write songs about them, for kissing the same guy as their friends, and for sneaking into and reading their partners' text histories. One shot they don't share is for 'making your friend cry at Coachella' - apparently Kendall's done it, but Hailey hasn't.

"Honestly, I'm so sorry," Kendall says to Hailey after downing her drink. What happened, guys?

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They Say They Used To Kiss Themselves

Justin Bieber kissing Hailey Bieber with Kendall Jenner smiling
via Gosds.ie

The next question is when it gets a little more personal. After someone announces 'never have I ever practiced kissing on a pillow or on a poster in my childhood room,' the women dish on how they ACTUALLY learned to kiss.

"What about the back of my hand?" asks Hailey.

"I wouldn't do the back of my hand, I would do the mirror," Kendall admits, laughing. "I would just kiss myself in the mirror...I've done the mirror."

"Maybe let's just both take a sip cause I've done the back of my hand," shares Hailey.

If you're reading this and thinking the mirror or hand smooching thing is a little odd, you're not alone.

"Is it weird that I wanted to makeout with myself?" Kendall asks Hailey.

"Nuh-uh!" Hailey responds. "You're cute!"

Sounds just like Hailey to lift a sister up! Nothing wrong with a little self love talk over a bowl of macaroni in the bathroom.

NEXT: Hailey Bieber Has Over 20 Tattoos + 9 Other Facts About The Model