That's true, though I think the built-in protection has been getting more common recently, so the others might just be too old to have it? *does not know*

I also love how they often don't make sense. At all. Granted that's not exclusive to Japan (Mmmbop, anyone?), but still. Someday, I will write a paper comparing Japanese music and English music re: their development from two really different styles of poetry.

If the chorus isn't the same (or mostly the same), how are you supposed to learn it?!

You're welcome. ^^