If the latter, how would this be determined? By careful research involving thousands of representativeslaveswomen? Or by decree from someone outside that group who knows deep inside it must be so?
This started with Phiwum offering a counterexample to argue that something can be degrading without the victim thinking (or more precisely, admitting) it is.
I have a different example: Back to the Future. "Hello, hello, anybody home? Huh? Think, McFly, think!", while tapping him on the head.
McFly at that time doesn't admit that what's been done to him is degrading, but everyone else in the movie and the audience think it is (or at least, most of the audience).
I tend to think that not being able to show your own face because you happen to belong to a certain gender is degrading. My opinion on whether burqas are degrading to women depends not on what they publicly admit, but on their actual freedom to choose to wear it or not (that is, the social consequences of not wearing a burqa).