「Erotic foot orifice with compacted feces」: using a no-longer-integrated foot and finding traces of shit in it! so, using only ONE LEG (the other one?). …frankly though, some clients do in fact enjoy that sort of thing. TO FALL OVER, since anyone with such a foot just might disconcert a client from time to time. Perhaps depicts a client who starts out with one of the no-longer-integrated feet but then upgrades the service menu, making the HALF-STRIDE down to the impacting-compaction orifices…or, offered as a remedial measure by the shaman proprietress rather than issuing a partial refund.
Note however, that anyone taking a half stride or attempting to walk with only one leg will simply FALL OVER as did animals without backbones, or, hop about in circles as might an injured bunny. TO FALL OVER, since anyone with only one leg, or taking only half strides but not moving the other leg will not be walking far.
As outrageous as this the external definitions for this glyph seem, what is even more outrageous it the fact that:「Qing Dynasty sex manuals listed 48 different ways of playing with women's bound feet.」
[ https://en.wikipedia.org/wiki/Foot_binding 2012-12-17 ]
…and with this many possibilities we should expect a full range of variations and personal styles, 'tastes' as it were. The Chinese learned early on that the anus and its associated region contain plenty of nerve endings…a「really good」no-longer-integrated foot only had the large toe still attached that could be deeply inserted and manipulated to apply pressure on the prostate gland (the male equivalent of a Gräfenberg spot) as an animated butt plug—the other toes had fallen off:
「…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.」
[ https://en.wikipedia.org/wiki/Foot_binding 2012-12-17 ]
USING ONLY ONE LEG because the other is a「ruined, scarred」(址)「orifice for compacting」and so on.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: brief; short step
Japanese EDRDG: to step, stride equal to half a pace
Unihan extended: to step; a stride equal to half a pace