The true, 'unfallen' state that Adam and Eve enjoyed was one in which the self was totally unaware of itself. The soul was in complete contact with God, and in the process knew itself fully. There was only a sense of wonder and the abiding presence of God. This is a state in which embarrassment is not possible. Now the soul is lost to both itself and God.
Pain is so humiliating to the self.
As important and huge as 'I' seem to myself, continuous pain sends an important message to my inflated ego. God seems to say to me.