I have found...especially recently, that while I thought I had no pride, humiliation is very interesting, as is my definition of punishment. Some things that others find humiliating I don't, such as facials or having my own cum wiped on my face. It doesn't turn me on, but I don't find it humiliating.
Other things, like trying to speak as my Master requests while sucking him, I have to steel my spine and do, because it's something that he enjoys. At first it was a little hard because...well, I'm not really sure why. Begging was another thing that was hard for me. It has taken me a little bit to understand that it isn't the physical humiliation that I have any sort of issues with, it's all mental.
My Master is very good at mental humiliation...and sometimes, I know that he wants me to fail, so that he can punish me. I'm learning, as quickly as I can, to make my mind as willing to the mental submission and power play as my body is willing to the physical.
And I am slowly getting accustomed and starting to enjoy the mental games. I think it just takes longer to get my mind to accept the mental slavery.