Yeah, it isn't just OCD that causes it. What will happen is you get the song stuck in your head, and it will be the same thing over and over again because you don't know the rest of the song, so it's like your brain can't finish the thought of the song. My mom told me this.

And I do not have OCD either, but I find myself having to play the same stuff over and over again sometimes just because I enjoyed it that much.