I agree with what's been said previously, very hard to judge unless all us females were lined up together etc, but for what it's worth, I'm a anticipatory giggler as soon as I see a finger wriggle or even hear the word, my body tenses up and I am uncontrollably giggling, with the laughter erupting on impact shortly after followed by that silent laughter when you know you're ler is really zoned in and there's nothing you can do about it. As for my feet, I'd say they are off the scale, I have to muffle my screams and laughter in a pillow so as not to wake the neighbours.
One lucky TMF guy has witnessed this reaction so far, but then he was one hell of a tickler, and also unprejudiced.