It does take a lot of getting used to. [Sakura's obviously sympathetic to that.] It'll start to make more sense over time, when you get used to how things work.

And the wings? I haven't been able to trace exactly why they affect us so much -- they're quite hard to examine with medical ninjutsu, unfortunately. But they're quite vital to health. Even losing a few feathers will probably knock you over, and actual damage will leave you in very severe shape, or even kill you.