Geza Schoen, founder and perfumer of Escentric Molecules, equates fragrance to a security blanket of sorts.

"Familiarity gives security," says Schoen. "A signature scent adapts your environment to a secure idea and a relative reaction. There is a lot of comfort in having a solid base you can relate to and for some, scent is their aura of comfort."

— Read more at So THAT'S Why You're So Attached to Certain Perfumes at InStyle.