Shame and Shamelessness

What is the relation between shame and shamelessness? It may seem obvious: shamelessness is simply the absence of shame. But on reflection, it becomes clear that the story is considerably more complicated. Michelle Mason's intriguing "On Shamelessness" prompts such reflection (albeit unintentionally). Mason argues that we should be mindful of the "moral importance of shame" and "unapologetic in its defense" (403), and she does so via an examination of shamelessness and an argument to the effect that shamelessness is (with some exceptions) a moral fault. The tacit assumption is that insofar as shamelessness is a moral fault, the value of shame is vindicated. I challenge that assumption.