Anal, A-level and Greek are three names for one line
Greek is the oldest of the three and still appears on Hong Kong adverts, carried over from European escort copy.
A-level, sometimes shortened to AL, arrived from the shorthand of British escort adverts and is the one you will meet most on adverts written in that style. Anal sex is simply the plain wording, and it is the plain wording used here. They mean the same thing, and that matters practically, not academically: the word she uses when she answers you will not always be the word in her advert, so if you write asking about A-level or Greek and the plain wording comes back, that is agreement and not a correction.
The codes sitting beside anal came from one borrowed list
OWO, CIM, DFK, rimming: the same abbreviations turn up on Hong Kong adverts in the same order they turn up on British ones, because the list was copied wholesale and not assembled here. That has a consequence worth knowing.
Each of those codes is a separate agreement, and their appearing together is a habit of the template, not a statement that she treats them as one package. Three of the four belong to one line, and what OWO and CIM are actually asking is spelled out on its own. Ask about the one you actually care about, by name, in the message where you ask about anal, and do not read the cluster as a menu she has already agreed to. One of them is not a code at all: the girlfriend-experience adverts describe a manner and a length, which is why asking about it the same way gets you a different sort of answer.
On anal a yes with a condition attached is still a yes
The answers that come back are rarely a flat yes or no. Yes with notice. Yes at ninety minutes rather than an hour.
Yes, but not this week. Yes at a different figure from the one in her advert. Each of those is her terms being stated plainly, which is what you asked for, and the useful response is to take the condition as given instead of working at it. Pushing on a condition turns a booking that was going to happen into one that is not, and she will remember the message. The same applies in the other direction: if this would be your first time, write that down rather than leaving her to guess, because it changes the length she suggests and the order she plans the evening in. A woman who states no conditions at all on this is the one worth a second thought.
Central and Western holds the largest group, and the addresses behind it stay on the same short corridor along the north shore and the Kowloon side before thinning towards the New Territories.
Of the 504 women advertising this here, most leave both incall and outcall open, and those who pick one divide almost evenly between her place and yours, so the address narrows this down less than it looks. The figure in her advert is an hourly one in Hong Kong dollars, running from HK$1,200 to HK$3,900; what it does not carry is any condition she attaches to this one act, and that only reaches you in her reply. For everything outside this one line, the rest of the Hong Kong adverts sit one step back.