Because of it's wonderful music, just like chocolate for your ears.

The art and culture pass on the spirit of romantic to us...maybe... Movies and songs... The first movie L'arrivée d'un train à La Ciotat was created by french director Auguste Lumière. And Le Louvre et La tour Eiffel always appear in romantic movies...=.=

French sounds for my Russian ear very unattractive and I am not going to learn it. A female student of mine said once she couldn't help laughing when she heard a man speak French.