Mine is probably a really cruel tickle cucking scenario, where I'm the tickle bull. Like, I absolutely love the idea of finding some pathetic guy who's either hopelessly obsessed with some particular girl, or else her "boyfriend," except she never lets him tickle her, because she's just too ticklish. But then, I convince her how hot it would be to tease him mercilessly by tickling her right in front of him. He would be tied up and helpless, not even able to touch himself, as I forced him to watch me live out his ultimate fantasy. Whatever way he most desperately fantasized about tickling her, I'd do exactly that, while she just howled about how bad it tickled, how she couldn't take it. I especially like the idea that she genuinely does feel bad for him, because he's just so pathetically desperate to tickle her, but it just turns her on too much to tease him out of his mind and make him suffer. Eventually we'd both get too horny, and I'd tickle fuck her right in front of him, and I'd tickle her hard through an explosive orgasm, and then cum inside her.
Then repeat as many times as possible, all while never letting the tickle cuck even touch himself.