I've been thinking (bit early I know)?

I thought about that a long time ago, (always when studying for exams) but the fact that you have hundreds of lyrics in your brain is because you have listened to the same song many many times. If you read a paragraph many times, you'll remember it as well. And also, in a song, you only have a couple of paragraphs and they are repeated, so i think the reason why lyrics remain printed in our brain is because of repetition and to memorize things when you study that is exactly what you do: repeat, repeat and repeat. I don't think it would be useful to study in a song.