「Screwing the adjacent tonguing mouth and screwing again」suggests REVOLVING through each of the service providers in a cave o' wonders, much like a ROLLING STONE, or rolling one's stones.
　A STONE ROLLER was used to dis-integrate and re-dis-integrate feet that had begun to mend internally.
　FOOT binding was:「…the custom of applying painfully tight binding to the feet of young girls to prevent further growth. …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.
　…The tightness of the binding meant that the circulation in the feet was faulty, and the circulation to the toes was almost cut off, so any injuries to the toes were unlikely to heal and were likely to gradually worsen and lead to infected toes and rotting flesh. If the infection in the feet and toes entered the bones, it could cause them to soften, which could result in toes dropping off. Although, this was seen as a benefit because the feet could then be bound even more tightly. Girls whose toes were more fleshy would sometimes have shards of glass or pieces of broken tiles inserted within the binding next to her feet and between her toes to cause injury and introduce infection deliberately. Disease inevitably followed infection, meaning that death from septic shock could result from foot-binding, and a surviving girl was more at risk for medical problems as she grew older.
　At the beginning of the binding, many of the foot bones would remain broken, often for years. However, as the girl grew older, the bones would begin to heal. Even after the foot bones had healed, they were prone to re-breaking repeatedly, especially when the girl was in her teenage years and her feet were still soft. …Bound feet were once considered intensely erotic in Chinese culture, and a woman with perfect lotus feet was likely to make a more prestigious marriage. Qing Dynasty sex manuals listed 48 different ways of playing with women's bound feet. …Bound feet rendered women dependent on their families, particularly their men, and became an alluring symbol of chastity and male ownership, since a woman was largely restricted to her home and could not venture far without an escort or the help of watchful servants.」
　　[　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 meaningless mnemonics)
Chinese: to revolve; stone roller
Unihan extended: turn round, revolve; roller
EDRDG: turn round; revolve; roller