35-year-old twins share a boyfriend, use the bathroom at the same time, and view themselves as one person

• 35-year-old identical twins Anna and Lucy are abnormally close and view themselves as one person.
• They do everything in unison, from eating breakfast to showering to going to the bathroom.
• They also share their boyfriend of 10 years, Ben, and want to get pregnant at the exact same time.

Anna and Lucy aren't your average twin sisters. In addition to looking and dressing identically, the 35-year-old Australian duo showers together, goes to the bathroom at the same time, and share a boyfriend.

As part of TLC's new reality show "Extreme Sisters," Anna and Lucy share their life adventures along with four other sister pairs.

Howard Lee, President of TLC Streaming and Network Originals, said in a press release that the series, "will introduce sets of inseparable sisters whose bonds are raw, honest and perhaps a little unconventional. Their sibling kinship brings the meaning of sisterhood to a whole other level."

The first three episodes show how the sisters' other relationships, with their romantic partners and families, for example, become strained due to their super-bonded dynamic.

Anna and Lucy share a boyfriend and strive for symmetry in everything they do

During the first episode, Anna and Lucy said they always felt close, but their bond intensified after their father died from cancer.

Now, they do everything the same way and at the same time.

"Obsessing about being identical is how we live our lives," they said on the show in unison. They also said they view themselves as one person.

If Anna vacuums their home for five minutes, Lucy has to vacuum for five minutes right after, and they watch each other the entire time. They also go to the bathroom at the same time, no matter what, and share their boyfriend of 10 years, Ben, who they met together on Facebook.

"Sharing a boyfriend, for us, means getting to be together all of the time," Anna and Lucy said during the debut episode.

Though Anna and Lucy don't have sex with the other sister in the room, they said Ben makes sure to please them in the same ways during their individual bedroom time.

According to Ben, he doesn't mind the arrangement, and loves both sisters because they're not afraid to "be who they are."

Their obsession with looking and living identically has medical and legal implications

But Anna and Lucy have to reckon with the risks of their close bond when, during episode one, Anna learns she needs one of her infected teeth surgically removed. Lucy demands she have her matching, but healthy tooth, removed so she and her sister can keep matching, but the dentist refuses.

The sisters also confront societal expectations when they realize their dream to marry Ben is illegal in Australia, since it's considered polygamy.

But they still have plans to start a family with Ben, which include getting pregnant at the exact same time through artificial insemination with his sperm.