Does Foot Size Matter?
Thanks, JoBelle, for your offering to science. Rest assured, someday, I will express My appreciation, personally, if you will submit to it...
My jen has some pretty sensitive peds of her own, to be sure! They require some "special handling," but can be quite impressive to the even the most experienced tickler.
I can also echo jen's vote for jaime, as among the most sensitive feet. An impressive response, to be sure!
And now, for My reflections on size...Based on My own history of tickling female peds (I prefer not tickle male peds, no offense guys), I vote that the longer the sole and the deeper the instep, the more responsive the foot, typically...There are some exceptions, of course (jen's feet are pretty diminuitive), but I feel there are 2 reasons for this correlation. First of all, a longer expanse of sole flesh means more nerve endings to attack/stimulate. Secondly, I am a big fan of working over that tendon that runs from the interior face of the heel to the ball of the foot.

In order to get maximum tickle effect, the top of the foot has to be somewhat "hyperextended" to better expose that tendon and make it taut and ergo most vulnerable.
😱 On the larger soles this tendon is much longer and typically forms a "visible ridge" on the instep. Kinda makes it hard not to know where to tickle...Muhahaha! Then you just purse your index finger and thumb on either side of the tendon and roam up and down it, while using the other hand to keep the top of the foot hyperextended. SOME ticklees even find light scratching to be intensely ticklish there! Tickling with a lubricant is generally VERY helpful to ALL concerned when using this technique too. Less friction generally means more intense tickle response here.
On the smaller feet, that tendon tends to be shorter and the tickler cannot travel as far across the transverse of the instep to make those tickles. Instead, the smaller foot requires shorter and more frequent strokes and one must be careful not to cause pain from all those rapid, short strokes.
I know, I take My "work" too seriously...
😀
Probably won't get invited to the Southern Gatherings for sharing this little tidbit...*smiling innocently at JoBelle

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*GuitarPeteTklr shreds his way back into tickling oblivion*