Just thought I would pass this on:
Several months ago my wife learned that our CAG(Shaka) was ticklish. For a couple of days, while cleaning the cage, she would tickle him. Well, soon it got to the point that she couldn't move her hand toward him without him lunging at her and biting her.
This morning I woke up to her standing over me with Shaka on her arm. She was beaming from ear to ear. She said she stuck her arm in the cage with closed fist and he stepped right up ;-)
You just have to keep learning ;-)