Whether you’re a beauty fanatic or not, you’ve likely seen the rather hilarious memes going round about eyebrows.

They revolve around the concept that one brow always looks perfect, while the other is seriously underachieving.

Right eyebrow: does yoga everyday, got into Yale, vacations in bora bora Left eyebrow: couch potato, procrastinator, listens to nickelback

— no (@tbhjuststop) September 26, 2015

I hate when one eyebrow comes out Gucci and the other eyebrow comes out Walmart — no (@tbhjuststop) July 28, 2014

Turns out it’s not just you – there’s a reason behind it. According to PopSugar UK , it’s all to do with how we move our brows.

“If someone is very animated or expressive then the brows are rarely symmetrical as the muscles have pulled them in all kinds of directions over the years,” brow expert Amy Jean of Amy Jean Eye Couture, who’s tweezed the likes of Naomi Campbell, Delta Goodrem and Danii Minogue, toldMamamia.

Raising one eyebrow more than the other over an extended period of time will make that muscle stronger, which can make the arch look higher.

Anyone else considering adding ‘brow squats’ to their exercise regimen?

Your sleeping position can also make a difference.

“Our faces are not symmetrical which causes the difference in brows and a lot of us tend to sleep on one particular side which over time could cause a difference,” explains brow expert and owner of Final Touch Brows Studio, Danielle Kurukchi.

Squashing one side of your face into a pillow consistently can apparently affect growth of your brows.(Post continues after gallery.)

Celebrities with great eyebrows.

12. Lara Bingle

Lisa Wilkinson

Zoe Foster-Blake

Lily Collins

Jennifer Connelly

Lea Michelle

Lena Dunham

Brooke Shields

Cara Delevigne

Emma Watson

Kendall Jenner

Gigi Hadid

Megan Gale

Sarah Hyland

Margot Robbie

Jennifer Hawkins

Hair growth itself can vary from person to person and also depends on our body habits which affect the length, shape and texture of our brows.

Don’t be alarmed though – a close look at any part of your body will reveal that everything is less symmetrical than you think. From nostrils to boobs to feet to eyes, it’s actually quite common for “pairs” to be different sizes.

“No-one, I meanno-onehas perfect symmetry. It’s border line creepy if you do. Brows don’t have to be perfect or ‘twins’,” says Jean.

Trying to make them otherwise is an impossible task. Almost.

“Always have a brow professional look after your brows. They know the correct starting points and how to make your brows appear as similar as possible and they will advise on what is most flattering for your individual face,” says Kurukchi.(Post continues after gallery.)

All your brow essentials

Amy Jean Eye Couture Brow Velvet $55

Final Touch Brows Brow Gel, $28

Napoleon Perdis Wand-er Brow, $29

Benefit Brow Zings, $55

ModelsPrefer Essential Brow Kit

Face of Australia HD brow kit

Australis brow tint

Maybelline Brow Drama

ModelsPrefer brow tint