Cute wing flapping - is it a sign of anything?

New GCC owner, my buddy is 3 years old. He's great and me and my fiance have been reading tons of information to give him the best home possible.

He does this cute wing flapping while putting his head against something (usually the pictured metal bar), and I just want to make sure it's normal. Most of what I've read leads me to believe it's just "wanty wings" and it's fine, but just making sure.

Appreciate any advice!