Instagram makes it easy to feel like you're friends with a person just because you've watched them cut bangs on Stories and double-tapped a Boomerang of them diving off a yacht in the Riviera. But a grid of Gucci and rainbow açaí bowls is only the smallest, most curated glimpse into the life of a cool girl. Want to get really intimate? Ask her what she smells like. (Then stop there — this isn't Ingrid Goes West .)