Actually letting them bite you isn't the answer! Their bite can be very vicious and dangerous!!! My worst bite was from a Cockatoo that bit me to my bones where I had a huge gash. I don't think anyone can just sit there and allow their cockatoo to just bite them and be able to take it....I know I wasn't able to and I've been raising and training birds for over 16 years. The only way I stopped the screaming was having to relocate the cage into a bird room where there's other birds around. He did sooooo much better when I did that but he likes it when I just sit there and talk to him and he talk back like a baby. But he was super dangerous if someone else is near by me, he sees me as his mate and he will fly attack anyone that gets too close. I try clicker training on him, but it doesn't work as he wants to kill the clicker instead. He won't even accept his favorite treat either. More and more I feel they should be left out in the wild as they really don't do well in captivity! That's more towards the bigger toos such as U2, M2, etc. My other too, LSC, she's a super sweetheart. The crazy Java the U2 have been re-homed due to everyone's safety since he tried to kill my other birds, attack my partner, eat up my house, attacked me if he don't get his way, etc. He was too smart for his own good. He was a very loving bird to me though when he's not acting crazy, the sweet things he does, soft sweet voice to speak to me, laying his head in my lap, he can be super adorable. But at the same time I do believe some of it is because how they were raised in the first place and hormone have to do with it as well....