Do people who humiliate others in BDSM scenes experience erotic pleasure from this? If not what is the pleasure? How do they "enjoy" the act of humiliation in a BDSM context (consensual) and abhor it outside the BDSM context?

Understand that for some humiliation is linked to guilt about liking sex. But being the humiliator... isn't that a really "perverse" power trip? Or anything which makes the top feel powerful is an arrow in their quiver?