If you train your slave properly, you can expect to see this kind of pride on it's face after an intense session of abuse because it's position in life is so thoroughly reinforced that it finds it's purpose in serving and accepting daily punishment.
A shocking leaked picture of a Product and Technique testing cunt (Pain and Degradation specialist) after a non stop 18 hours shift. Totally exhausted, the empire needs to rethink their policies on these cunts.