Let's say music is needed for only 43 seconds of film. You have to score it so it is an entity, so it won't bother anyone when it ends so quickly. Or if a song runs 2 minutes and 45 seconds, but the titles run a minute longer, you have to arrange that song so it doesn't get repetitious.
You go to a restaurant in the States and kids have these game boards at the table. You don't see that in Italy or Spain. It's not because they can't afford to buy them, it's because that's not what eating together as a family is about.
You wouldn't want to move if you sat next to me on the bus. Or maybe you would.