If the eyes are the windows to the soul, then the eyebrows are the eye-catching curtains.

You may think your arches are relatively unremarkable, but the truth is, they’re trés important in the biology of attraction.

A person unconsciously raises their eyebrows when they’re attracted to someone, so your brows are a “yes, I’m interested” signal you never even knew you had.

As a woman’s face ages, her brows descend closer to the eye, but think long and hard before you dash off for that pricy brow lift or series of Botox injections. Our arches are important signals of our emotions too—scrunched when we’re confused, lifted when we’re happy, etc.

Don’t let anyone underestimate your brows. Make sure your doc knows what he or she is doing, lest you end up with a frozen, forever-surprised face.

Here’s one quick anti-aging tip: Fuller tends to be better. Brows naturally thin over time, so full brows scream youth. If yours are looking sparse, lightly fill them in with a brow pencil.

If yours are on the bushy side, resist the urge to over-pluck. You run the risk of the hairs never growing back. Try trimming them instead.