Why do couples borrow cultural elements for their wedding, and how can you do so respectfully?

Many Anglo-Americans have such a mishmash of culture that they have few or no traditions that hold significant meaning for them. Perhaps people are inclined to like culture, symbolism, rituals, and traditions. Maybe they seek these out in other cultures because they don’t have any of their own. Perhaps people seek to set themselves apart from a family or culture that they don’t wish to be a part of or celebrate.