Love is forever, love locks are NOT! Be weary of a person that pronounces their love from Pont des Arts, the City of Paris takes them down average every 6 months. The bridge railings are not designed to withstand the weight and eventually starts to breakdown. And if you think love doesn’t cost a thing, a street vendor will sell you padlock on site for 5 euros +. Also be considerate of the fishes when you throw your key into the Seine River.