Im 1000% consumed by this fetish, but id never ask any celebrity if they were ticklish.
There's nothing wrong with asking. Especially for celebs where it is widely unknown whether they're ticklish or not. Just be respectful and not weird about it.
1. Don't be super weird about their feet or super specific about the tickling to the point where a reasonable person would be creeped out. Example: "how much would it tickle if you were tied up and someone was licking your feet or sucking your toes?"
That question is extremely creepy but variations have been asked before. Any normal, reasonable person would find that question creepy and disgusting. Even some of us in the community find it gross. Gotta be chill with the question asking.
2. If a celebrity has been asked about their ticklishness a lot, we should probably back the Hell off. Paige VanZant is one of those celebs. There's nothing wrong with posting stuff we find of her discussing it, but no one on here should be rushing to Cameo or any other site to message her about her ticklishness. At this point, we know she's ticklish, and self proclaimed extremely ticklish at that. We don't need to ask her again "how ticklish are your feet or how ticklish are you?" Shes covered it many, MANY times at this point.
Not calling anyone out specifically and it's extremely possible that the creeps committing these issues aren't even part of the TMF. But there's a reason tickle and foot fetishists have a bad rap and it's because we berate people to death with requests for their feet and ticklishness.
We as a community need to do better and need to spread awareness about our behavior as well. Like I said, it's important to watch out for each other and keep each other in check.