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Once upon a time, Allure ran advice columns by our favorite beauty pros.

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Why is the way we interact with scent so subjective?

I remember what I was wearing, olfactorily speaking:Dior Lucky,a joyful lily of the valley.

This bottle of happiness still transports me back to that day and there are five good reasons why.

There’s a biological pathway between scent and emotion.

With each breath we take, we inhale more than air.

It’s all a bit of a mind game.

“Smells exist only in our heads.

“Odors are perceptions.”

Where you live matters.

You might stop noticing a loved one’s perfume.

The technical term for this is olfactory adaptation.

“After about 20 minutes, we no longer smell [a scent],” says Dr. Herz.

Seeing isn’t the only way of believing.

AsDavid Moltz, the perfumer behind D.S.

you’ve got the option to create a whole narrative with aromas.”

Read more stories about fragrance.

Now watch Idris and Sabrina Elba’s beauty routines.