This Is Actually An Old Idea Of Mine, Revisited...
Seems like the timing is right...so...I'll weigh in on this one...now that I know interest is qualified.
My vision of the ideal shoe for this innovation is a sort of "heel strap clog." As The Pianist has already stated, you need that deep wooden enclosure to inconspicuously house the tickling mechanism(s). The center could be cut away and/or hollowed out for the installation for a "DC motor driven belt system...positioned directly below that tendon *sweet tickle spot* at the center of the sole," then...thoughtfully and carefully concealed with enough semi-sheer sole fabric to provide cursory support. Also, some thought would have be given to incorporate a "power source" too. Some "D" batteries, hollowed into the cutaway would probably do nicely. The belt could probably be constructed of soft compound rubber, with soft "tines" protruding from it. Also, the cavity would have to include enough space to accomodate compact a "radio-controlled" on-off/intensity switching system.
The "tickler" could then be the keeper of the "remote control device" either adjacent to the ticklee or across the room. Tickles could be imparted sporadically and without notice in even the most "challenging" circumstances...such as...at a party with one's family or co-workers and such...user discretion (or indiscretion
) would apply here. Imagine some of the facial expressions you could evoke with "that kind of power" over the ticklee trying desperately to maintain composure!
At the end of the "outing," my vision allows things to "heat up" once the tickler/ticklee are allowed to interact "less discreetly." I, of course, realize that some here prefer not to view the act of tickling in that manner...in which case...you could enjoy the "playfulness" of it all...To each their own...it's all good in the end analysis.
Well, gang, that's the concept. Might need a little refinement as it transtions from "theory" to "application," but I think the core elements for an enjoyable "tickle scene" are there. I have little doubt that the "peanut gallery" will have a "field day" with this one.
*Stirring the caldron ONE MORE TIME, before making his "Grand Exit."