Nathaniel Branden said this quote

It is not only negative feelings that become blocked. The repression extends to more and more of his emotional capacity.When one is given an anesthetic in preparation for surgery, it is not merely the capacity to experience pain that is suspended; the capacity to experience pleasure goes also - because what is blocked is the capacity to experience *feeling*. The same principle applies to the repression of emotions.Chapter 1: Discovering the Unknown Self, pg. 9, Bantam Edition, 1984