Anyone who has siblings will attest to how tough it can be to share.

Except, it seems, when it comes toBrooke and BayleefromTLC’s new reality show “Extreme Sisters.”

These sisters have taken sharing to a whole new level.

Brooke and Baylee posing outside

Some might even say, to an extreme.

They even share toothbrushes and underwear (viaFox News).

When did all this sharing start?

Brooke and Baylee smiling

Where did it come from?

Here is what makes “The Candaces” different from other sisters.

“So, me and Baylee growing up, we shared a room, our entire lives.

Baylee and Ace posing outside

And so when my friends would come over, they didn’t just hang out with me.

It was all of us in the bed at the same time.

It was, I mean, like there were no boundaries.

We shared the same bathroom in the same room, same closet, same everything.”

The Candaces also knew right away that their bond was different from other sisters.

“I wouldn’t even talk to their sisters.”

However, no matter how much they stood out, Brooke and Baylee liked the way they grew up.

And so did their friends.

For example, as they revealed to The List, they even have the same career.

“Our whole family is like either teachers or preachers.

It’s like a running joke,” Baylee said.

“And so I kind of just always wanted to be a teacher.

So did she, and we’re like, ‘Why not?

We could work at the same school.

Be off with our kids.

It’s perfect.'”

She’s hiding behind the curtain.

“She is a huge part of our life.

I feel like she’s literally both of our daughter.”

New episodes of “Extreme Sisters” air Sundays at 10 p.m. ET/PT on TLC.