Aespa‘s Karina recently divulged a personal secret to fans that makes her quite unique.

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| @aespa_official/Twitter

While revealing their secrets, Karina surprisingly said that she had a lot to reveal.

She decided to tell fans a secret about her body that not many others know, besides the members of aespa.

Surprisingly, she said her tailbone is way longer than average.

My tailbone is longer than those of most people.

— Karina

How does she know this? If she sits normally, she can’t really feel it.

However, in certain positions that put stress on the lower back, it will actually touch the floor and feel super painful.

Winter even recalled a time when the girls were performing an exercise similar to a boat pose and Karina couldn’t stop wobbling.

It turns out, that’s one of the poses that is a definite no-no for her tailbone!

It makes it difficult for her to sit down for long periods of time.

It’s okay, Karina. Your secret is safe with MY!

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| @aespa_official/Twitter

Watch the full clip below!