It doesn’t seem like a good reaction to unexpected touches in vulnerable places. Why helpless laughter, and not a trigger for some sort of fight/flight response?
tickle if no one laughed? 
It’s supposed to be a fact that you can’t tickle yourself. But I have always found that to be untrue. When I lick the roof of my mouth with my tongue, it feels like tickling. It doesn’t make me laugh, mind you, but it’s similar.
I love this magazine. It’s got answers to everything. 
Funny article all around. Suites the subject.
Dang, that link didn’t work. Just type tickle in the keyword place. It’s the last one on the second page.
I’m sure I read an explanation here, but I’ll be damned if I can find it!
It was along the lines of knowing that the attack on a sensitive area of the body was a mock attack, and so the reaction does involve the squirming (which you might associate with a real attack), but also the laughter to avoid the tension associated with a real attack.
Rearrange those words into an elegant sentence.
Well, if someone only looks at my side or feet, he’s sure to get an instant kick in the nuts. I don’t laugh at all, the instant reaction to tickly touching is an elbow swung backwards.
MPSIMS: in Mongolia (Ghengis Khan era) there was a prohibition against spilling the blood of members of the royal family. A consequence of this was that members of the royal family could and were executed by being tickled to death. Apparently, the diaphram would eventually spasm and the individual would suffocate.
See my recent post here .
Must suck to be your doctor.