A lot of my fantasies are very Dark and involve Rape, Torture etc. I feel the reason for them in my case is I've become so emotionally numb and I'm married to a very mild mannered man that I need to 'feel' something
I'm such a strong willed person but I want to feel not in control, to be able to let my control go, but the only way that would happen is if it was forced.
I've learned not to feel bad about the fantasies they only time they became a problem was when I spent ALL my time acting them out through Second Life and neglecting my real life.