Perhaps it would be more fruitful if we discussed sexual fantasies that you would actually consider exploring if you could find the right person to explore them with, rather than sexual fantasies that you really never intend to pursue.
Mine is a fairly heavy teasing and denial session in which I'm bound, played with and abused. But, instead of ending in total frustration and humiliation, at the end I'm practically (if not actually) begging to be fucked and then, finally, she relents and practically rapes me. But, as someone mentioned on another thread, it's really, really difficult to find a provider who knows how to and/or likes to play this way. (Believe me, I've tried to find someone for years.)