This may get a bit vivid. Be warned. I have a twisted sexual history. After being molested at age 5 and again at 14 I somehow allowed myself to get taken advantage of and used in regards to sex. It took me many years to heal and much pain to get to where I am now and I can have a healthy sexual experience with my current boyfriend....
I have serious problems becoming sexually aroused without fantasizing about certain BDSM-like scenarios. I've been having fantasies of that sort for a really long time- years before I even knew what BDSM was- so I was thinking that my problem might just be that I'm used to these types of fantasies and only fairly recently started trying to use other means to get myself off, so to speak....