Cockatoo lifts hand

[ParrotLover7]

Hi,
I haven't posted in a while. Anyways, a long time ago I met a cockatoo(male sulphur crested) he would bow to me and he liked to raise his hand for me. I asked the owner what this meant and she said that he just wanted to grab you and not let go. I thought there must have been more to it, so I held my finger out as he gently grabbed on. O thought he might wanted to step up but turns out they don't train the parrot!!!!Do you guys know what this body language means or what he wants?
Thanks

 

[ToMang07]

My U2 (Willow) is very expressive with her feet. From "Stop it!" Jedi-parrot mind tricks, to holding onto your hand, to trying to "shush" you if she wants to talk (instead of you,) I find she is very expressive. Just need tje time to learn all the body language/expressions.

This was taken a couple weeks ago, my brother and I were having an early morning conversation and she decided it was too early to listen to him talk, lol