Well, being a woman, I know that I am extremely ticklish and the thought of someone tying me up and tickling me turns me on beyond belief. I get so turned on reading some of the stories and even watching some of the videos that don't involve sex at all, I almost could have an orgasm without being touched. No one knows about my secret fantasy, not even my husband. He's kind of closed minded about things like that. I confessed a bondage dream I had once, no mention of tickling, and he kind of thought it was weird. I have a special online buddy that I chat with and sometimes just the chat turns me on to the point that I cannot sit still in my chair! No one has ever actually done that to me before, and I can only imagine it and how amazing it would be. I can only remember how much it would tickle if a boyfriend or friend would play tickle me or give my foot a quick tickle if the opportunity presented itself.
So, I believe the answer is that yes, a lot more women are turned on by it than will admit it.