Shins,
I can only give you a personal opinion (sorry, that's obvious!)

1. Do others get turned on from being humiliated by their partner?

During love making, no. During rough sex, yes, yes, yes *sighs*

2. Does anyone have an opinion as to why its an erotic experience for some?

For me, I think it is mainly to do with guilt based on my work and upbringing. I have to be very professional at work, diplomatic, considered and restrained. I have to ensure that I do not offend anyone but the nature of my work involves making judgements of sorts and there is never a win-win situation. I am not immune to feeling guilty about this part of my work. So sexually, I need to be humilated, a sort of penance for having to have made a decision (no matter how objective and unbiassed) that will affect someone along the line. I feel positively hollow if I haven't been slapped, spat at, thrown, 'forced', sworn at, insulted, degraded and threatened, etc.

Also, having been raised as a good Catholic girl, as another good Catholic girl said: I've been raising up my hands, drive another nail in, I have enough guilt to start my own religion.
*gets on her knees to pray then remembers she's now agnostic*
Asia
xxx