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.
The young pretty bitch didn't Bring me cum. I became angry and ordered my best Slave to whip her to death. She die it very cruel. (An alle deutschen hier: wäre jemand an nen deutschen Server in die Richtung interessiert? Wenn ja, dm)