大きな滑らかな石は、専門家でない人が足を叩いて足の骨をバラバラにし、後で顧客が使用できるように足裏を準備するために時ー使用されていました。王朝時代の中国では、男性顧客が石を足に叩きつけて足裏を使用していました。骨がバラバラになった足が接触する場所は「足の骨がバラバラになった開口部のある睾丸、脚の開口部が上がった棒」です。故意に足の骨をバラバラにしていない人にとって、裸足で歩くときに足の裏が石に接触する部分です（まさにその理由から、あまり良い考えではありません）。
足の包帯とは：
「…少女の足がそれ以上成長しないように、痛いほどきつく縛る習慣。…この処置は、足のアーチが完全に発達する前、通常は2歳から5歳の間に開始されます。足が麻痺している可能性が高いため、痛みがそれほどひどくないため、縛りは通常、冬の間中に開始されます。…足のサイズを小さくするために、各足のつま先を下に曲げ、つま先が折れるまで大きな力で下向きに押し、足の裏に押し込みます。骨折したつま先は足の裏にしっかりと押し付けられ、足は脚でまっすぐに引き下げられ、土踏まずが無理やり折られました。包帯は足の甲の内側から始めて、つま先の上、足の下、かかとの周りに8の字を描くように繰り返し巻かれ、骨折したばかりのつま先は足の裏にしっかりと押し付けられました。足の周りを一周するごとに、包帯が締められ、足の指の付け根とかかとが引き寄せられ、骨折した足が土踏まずで折れ、足指が下に押し付けられる。…最初に包帯を折ってから継続的に包帯を巻く作業は、通常、少女の家族の年長の女性か、プロの包帯職人が担当した。母親が行うよりも、娘の痛みに同情し、包帯をきつく締め続けることを望まない母親が行う方が望ましいと考えられた。…清朝の性行為取扱説明書には、女性の縛られた足で遊ぶ方法が48種類も記載されている」（もちろん、縛られた布を外した後）
　【　https://en.wikipedia.org/wiki/foot_binding　2012-12-17、強調は当社による】

A large, smooth rock was sometimes used by non-professionals to strike and dis-integrate a foot in order to prepare the SOLE for use later by clients. Male clients in dynastic China then used the SOLE by striking their rocks against the foot. The place where the dis-integrated foot made contact with「testicles with foot-dis-integrated orifice, raised rod in raised leg orifice.」For folks not deliberately disfigured, the SOLE of the foot is what makes contact with rocks when walking barefooted (not such a good idea, for that very reason).
　FOOT BINDING was:
　「…[T]he custom of applying painfully tight binding to the feet of young girls to prevent further growth. …The process was started before the arch of the foot had a chance to develop fully, usually between the ages of 2 and 5. Binding usually started during the winter months since the feet were more likely to be numb, and therefore the pain would not be as extreme. …To enable the size of the feet to be reduced, the toes on each foot were curled under, then pressed with great force downwards and squeezed into the sole of the foot until the toes broke. The broken toes were held tightly against the sole of the foot while the foot was then drawn down straight with the leg and the arch forcibly broken. The bandages were repeatedly wound in a figure-eight movement, starting at the inside of the foot at the instep, then carried over the toes, under the foot, and around the heel, the freshly broken toes being pressed tightly into the sole of the foot. At each pass around the foot, the binding cloth was tightened, pulling the ball of the foot and the heel together, causing the broken foot to fold at the arch, and pressing the toes underneath. …It was generally an elder female member of the girl's family or a professional foot binder who carried out the initial breaking and ongoing binding of the feet. This was considered preferable to having the mother do it, as she might have been sympathetic to her daughter's pain and less willing to keep the bindings tight. …Qing Dynasty sex manuals listed 48 different ways of playing with women's bound feet」(after removing the binding cloths, of course)
　　[　https://en.wikipedia.org/wiki/Foot_binding 2012-12-17, emphasis ours　]　

Modern definitions (that generally disregard history) …excluding politically incorrect concepts and other meanings deemed offensive today; may list only pigeonholed definitions, euphemisms, or meaninglless mnemonics)
Chinese: variant of 蹠
Unihan extended: sole (of the foot)
EDRDG: sole of the foot