It starts with a certain angle: A smartphone tilted at 45 degrees just above your eyeline is generally deemed the most forgiving. Then a light source: the flattering beam of a backlit window or a bursting supernova of flash reflected in a bathroom mirror, as preparations are under way for a night out.
The pose is important. Knowing self-awareness is conveyed by the slight raise of an eyebrow, the sideways smile that says you're not taking it too seriously. A doe-eyed stare and mussed-up hair denotes natural beauty, as if you've just woken up and can't help looking like this. Sexiness is suggested by sucked-in cheeks, pouting lips, a nonchalant cock of the head and a hint of bare flesh just below the clavicle. Snap!
Afterward, a flattering filter is applied. Outlines are blurred, colors are softened, a sepia tint soaks through to imply a simpler era of vinyl records and VW camper vans.