Music and how it affects our children

Kids easily pick up songs, or 'key phrases' that stand out, I try to avoid words with swear words around them, and it's really a shame when there's a song, tune, you know they would really appreciate because it's catchy but halfway through there's a swear word! I let my nephews watch Pirates of the Carribean once, the youngest about 3-4, found it amusing when one of them shouted "Bloody Pirate!" He went around saying it for a few days afterwards!