I completely agree with what Rhiannon said. I dated someone who was very ticklish but they HATED it. They would hardly let me do it and when I did, they would get annoyed. It didn't matter if it was a fun and intimate setting or not. Some people just don't tolerate it at all. I mean I would get a few tickles and pokes in here and there, but they wouldn't let me go further than that. And it sucked because we were in a serious relationship and having seen the reaction that I could get out of them when I DID tickle them it only made me crave tickling them more. But I couldn't, and it was frustrating and it did cause conflict. Once you know they're ticklish you are tempted to tickle them and you can't just settle for once in a blue moon.
On the other hand, if they weren't ticklish at all, I wouldn't feel like they are intentionally denying my fetish. They can't help not being ticklish so I don't feel as they are saying "NO, I hate it" to something that I love, like would be in the other case. Besides, there are many other things that can satisfy me sexually and intimately besides tickling. As long as it is a loving relationship, I would be fine with it.
On the other hand, if they weren't ticklish at all, I wouldn't feel like they are intentionally denying my fetish. They can't help not being ticklish so I don't feel as they are saying "NO, I hate it" to something that I love, like would be in the other case. Besides, there are many other things that can satisfy me sexually and intimately besides tickling. As long as it is a loving relationship, I would be fine with it.