When the Eiffel Tower was completed in 1889, Parisians scorned the structure, calling it a grotesque “stain” on their beautiful city. (2)Today, it is the beloved symbol of Paris, attracting millions of tourists every year. (3)Why did people’s attitudes change so dramatically? (4)It turns out that mere repeated exposure to this famous French landmark made a difference over time. (5)Contrary to the old proverb that familiarity breeds contempt, familiarity with an object actually breeds fondness. (6)Take another example, this one a piece of large-scale public art. (7)Many residents of Grand Rapids, Michigan, were not pleased when presented with their new downtown landmark, an enormous metal sculpture titled “La Grande Vitesse,” created by the eminent artist Alexander Calder. (8)Their reactions included such comments as “an abomination,” “an embarrassment,” “a waste of money.” (9)Other people were neutral; few seemed enthusiastic. (10)But within a decade, the sculpture had become an object of civic pride: Its picture adorned bank checks, city posters, tourist literature—and even the city's official logo. the main idea is ?