Barcelona is very good at selling romance, but its more interesting love stories are rarely about sunsets and famous monuments. This walk follows six places where affection collided with rules: nightlife outside respectable norms, courtship printed as cheap popular comedy, a public kiss assembled from thousands of private photographs, marriage split across religious and civil paperwork, a flower fair that evolved into a lovers' ritual, and a street whose romantic name still has no proven explanation. The route is playful, but the evidence gets the last word — including when the evidence says we simply do not know.