I've got two comments here, first for vanillas, and the second for us.
For vanillas, I think the biggest misconception is that tickling is some sort of affliction to be fixed. Or that if you're accidentally tickling someone, during a massage, for example, that you must immediately stop and change what you're doing. Nothing drives me crazy more (in a bad way, I mean) than when I do a search for videos on tickling in massage or in a medical setting and the medical practitioner or the massage therapist stops or changes their technique when the client/patients starts laughing. If they're wincing or cringing because of PAIN, that's just fine, they gotta power through it and they just keep on going but HEAVEN FORBID they elicit a giggle during, say, an abdominal exam or foot massage. "Stop everything! Oh my gosh I'm so sorry I'm tickling you, I will change what I'm doing immediately." Dude, just keep going and do what you gotta do. Except in extremely rare cases, pain is worse than tickling. Now, if the patient is doing a wince or it's clearly an extremely uncomfortable kind of tickling, that's a different story of course, but jovial laughter, which is what it almost always is, COME ON. JUST KEEP DOING THE PROCEDURE, LET THEM LAUGH. YOU'RE NOT GOING TO UN-ALIVE THEM. lol
Man does that grind my gears. Or videos that say things like "how to cure ticklishness" or "how to stop being ticklish during a pedicure." NO, JUST STOP! LOL
Second for us, the biggest misconception, which I incorrectly held for years, was that if someone was ticklish, especially very ticklish in front of other people, that they surely were "one of us." That's almost never the case. Ticklishness and extreme ticklishness does no correlate with being turned on by it, believe me. In all my life, and I'm old, trust me, I've only come across maybe three people who I could sort of tell where "one of us" after their ticklishness was discovered. That's out of hundreds of tickling situations I've been in. I've said it many times on this forum: Our fetish is a rare one.
Anywho, my two cents!