Thursday, January 29, 2009

Extra analyses

Some extra analyses of my count. This time I will analyze all prostitutes. So I will also analyze really old data. The total number of prostitutes counted was 5033.

I noticed that older prostitutes more often engage into unsafe or dangerous sex than the younger ones. I wanted to do some more precise analyses. Many prostitutes didn't say their age to clients, but a large majority of the reviewed prostitutes have an estimate mentioned in the review forms. These are in four year increments, such as 18-21, 22-25, 26-29 ...... 46-49 and then 50 or older. I calculated numbers for each age group (when no age group is filled in, I will use other sources), and then you can see a really clear trend.

Using the age groups is obviously not reliable, but the ages mentioned by prostitutes aren't reliable either, so it doesn't matter. And this way the samples become really large (you know the law about the big numbers).

First I will look at the average number of review forms filled in per prostitute categorized by age group. Not all clients fill in a review form, but it would be too time consuming to count all reviews. At the top of the review page there is a summary with all the information in the review forms, I used that summary, it would be crazy to go through each review-form.

Average number of reviews per prostitute of a total of 4734 prostitutes:
total: 3,552 review forms per prostitute (N=4734, not all had a review form)
18-21: 2,467 review forms per prostitute (N=735)
22-25: 3,088 review forms per prostitute (N=1326)
26-29: 4,174 review forms per prostitute (N=1028)
30-33: 3,989 review forms per prostitute (N=544)
34-37: 3,552 review forms per prostitute (N=446)
38-41: 3,912 review forms per prostitute (N=307)
42-45: 4,198 review forms per prostitute (N=192)
46-49: 5,875 review forms per prostitute (N=88)
50-..: 4,941 review forms per prostitute (N=68)

I will give these numbers because it could be that when prostitutes are reviewed more often, more unsafe sex is noticed (that turns out te be the case if you analyze that too). Notice also that older prostitutes don't seem to be less popular, the prostitutes 46 years or older seem to be the most popular. The youngest group of prostitutes seems to be the least popular. On the other hand, you also have to look at the periods during which the prostitutes have been observed by the clients. I will give another list which gives the average of the lengths of the period (in years) during which the women were observed, and also the average number of reviews divided by the average period:

18-22: during 0,412 years (5,984 reviews/year)
22-26: during 0,707 years (4,367 reviews/year)
26-30: during 1,170 years (3,569 reviews/year)
30-34: during 1,303 years (3,062 reviews/year)
34-38: during 1,269 years (2,798 reviews/year)
38-42: during 1,566 years (2,499 reviews/year)
42-46: during 1,755 years (2,393 reviews/year)
46-50: during 2,172 years (2,705 reviews/year)
50-..: during 2,080 years (2,375 reviews/year)

In that case you will notice that the younger prostitutes are indeed more popular. But comparing the age groups of 34 years and older with each other the differences are not that big.

Now unsafe sex. Notice that the older the prostitutes the more often they engage into this.

age 18-23 years (N=761):
23,784%: blowjob without condom
38,896%: kissing
45,729%: Cunnilingus
7,096%: anal with condom
0,131%: anal without condom
5,782%: rimming (buttlicking)
4,993%: facial
1,314%: coitus without condom

age 22-25 years (N=1348):
25,890%: blowjob without condom
40,282%: kissing
47,997%: Cunnilingus
7,641%: anal with condom
0,223%: anal without condom
6,899%: rimming (buttlicking)
6,602%: facial
1,484%: coitus without condom

age 26-29 years (N=1053):
23,457%: blowjob without condom
46,534%: kissing
54,036%: Cunnilingus
10,066%: anal with condom
0,950%: anal without condom
11,871%: rimming (buttlicking)
6,743%: facial
1,425%: coitus without condom

age 30-33 years (N=556):
29,137%: blowjob without condom
52,698%: kissing
56,835%: Cunnilingus
10,612%: anal with condom
1,439%: anal without condom
13,309%: rimming (buttlicking)
7,194%: facial
2,878%: coitus without condom

age 34-37 years (N=455):
35,385%: blowjob without condom
60,879%: kissing
57,363%: Cunnilingus
11,209%: anal with condom
1,758%: anal without condom
11,209%: rimming (buttlicking)
8,352%: facial
2,857%: coitus without condom

age 38-41 years (N=314):
44,904%: blowjob without condom
63,376%: kissing
68,153%: Cunnilingus
14,331%: anal with condom
1,274%: anal without condom
16,879%: rimming (buttlicking)
12,739%: facial
6,369%: coitus without condom

age 42-45 years (N=195):
52,821%: blowjob without condom
65,641%: kissing
67,179%: Cunnilingus
17,436%: anal with condom
4,615%: anal without condom
14,872%: rimming (buttlicking)
12,308%: facial
14,872%: coitus without condom

age 46-49 years (N=90):
56,667%: blowjob without condom
74,444%: kissing
73,333%: Cunnilingus
17,778%: anal with condom
6,667%: anal without condom
27,778%: rimming (buttlicking)
17,778%: facial
15,556%: coitus without condom

age 50 years or older (N=71)
71,831%: blowjob without condom
76,056%: kissing
66,197%: Cunnilingus
25,352%: anal with condom
5,634%: anal without condom
22,535%: rimming (buttlicking)
14,085%: facial
29,577%: coitus without condom


The next thing I will do is to give the grand total (N=5033):
29,386%: blowjob without condom
47,844%: kissing
52,951%: Cunnilingus
9,875%: anal with condom
1,053%: anal without condom
10,252%: rimming (buttlicking)
7,371%: facial
3,159%: coitus without condom

And, as a gimmick, I'll show only the result where prostitutes had only one review-form filled in. This way you could make a rough estimate of how often (percent of the visits) the prostitutes who perform unsafe sex actually do this. This is not totally reliable, because I also included the cases where prostitutes offered these kinds of sex, but where the clients didn't use this service (but this doesn't happen too often). And, of many others it simply is not known if they do it. But I will show the results of these calculations anyway, probably the estimates are too high.

22,276%: blowjob without condom (76% of the visits???)
37,127%: kissing (78% of the visits???)
39,938%: Cunnilingus (75% of the visits???)
5,141%: anal with condom (52% of the visits???)
0,220%: anal without condom (21% of the visits???)
4,174%: rimming (buttlicking) (41% of the visits???)
4,262%: facial (58% of the visits???)
1,054%: coitus without condom (33% of the visits???)

Funny thing is, that I previously didn't really notice that older prostitutes more often do unsafe sex. The statistics don't give a reason why, but I think it must be because older prostitutes have to offer other things to attract clients instead of their beauty. My earlier opinion was that if you want to avoid victims of forced prostitution you'd better visit older prostitutes, because they aren't very interesting to pimps. But this new data makes me wonder; perhaps that older prostitutes less often have problems with pimps, but get something else in its place instead. But perhaps they are just more open-minded.

Wednesday, January 28, 2009


Talking about Zuzana: I just received the news that three recruiters for the agencies Zuzana, hotelbabes and Hotelgirls have been apprehended who are suspected of recruiting 130 women from the Czech Republic. This case came to light when (February last year) a woman from the Czech Republic fled a house in Rotterdam and then reported to the police. The three recruiters are a 30-year old man from Nieuw-Vennep and a 41-year old man and a 49-old woman from Zelhem. Weekly some 4 to 6 women were put to work in hotels alongside Dutch speedways. The police suspect that the women were paid commission if they recruited other women. Read it all over here:

And I just got in some other news that also three Hungarian pimps have been caught who forced women from their home country to work in the window prostitution of Alkmaar. The women were forced to hand over thousands of euros per month. The women weren't supposed to get outside or to talk to strangers. The pimps decided how the women were supposed to look. They were supervised continuously. They also had to let know their pimps by SMS how much they earned per client. A 19 year old girl reported to the police. Read it here:

Just a coincidence, this is not a newssite anyway.

Escort prostitutes 2008

Now the escort prostitutes who I counted on This group is dominated by Dutch and Eastern European women.

Eastern European are often advertised on special escort websites like, and (but also other websites of course). All the prostitutes on the websites I mentioned seem to be from the Czech Republic (Prague) and Hungary (Budapest) (according to the websites themselves), but that seems to be very unlikely to me. A couple of clients noticed that some Hungarian prostitutes actually said to be from Russia, and one "Hungarian" girl advertised on this website is the Romanian pornstar Angelika Black. There is also overlap between these websites, prostitutes on one website sometimes also work on the others (perhaps the same organization?). The prostitutes seem to be working in hotel rooms which function as a sort of illegal brothels; because clients also see other prostitutes when they visit these rooms. That is a problem because I counted these women as escorts, but perhaps you could also see them as illegal brothel workers.

Dutch prostitutes are often advertised on websites like, and where prostitutes can advertise for themselves. However, behind these seemingly independent escorts many times an agency seems to be operating.

Actually, many escorts in general seem to be receiving their clients in hotels, also the Dutch prostitutes. I also noticed that some clients take the (Eastern European) escort prostitutes to swingers clubs.

I counted 694 escort prostitutes. To make the data more comparable I only analyzed the 306 escort prostitutes who were observed between the period November the 14th 2007 and November the 14th 2008.

The clients can fill in review forms where they can group the prostitutes into the following subgroups:
34,314%: Eastern European (of whom 49.524% a nationality is known)
40,523%: Dutch (100,000%)
7,843%: No Group (50,000%)
3,922%: different (66,667%)
3,595%: Southern European (45,455%)
2,614%: Surinamese (100%)
2,288%: Latina (42,857%)
1,961%: Thai (100%)
1,961%: "other Asian" (66,667%)
0,654%: German (100%)
0,327%: Chinese (100%)

Of 225 women a nationality is known of a total of 306 (and here again, in the percentages used I assumed that when no nationality is mentioned the group to which a prostitute belongs in the review form has the same characteristics as of those of whom a nationality is named):
130 (44,412%): The Netherlands
25 (16,478%): Czech Republic
15 (9,879%): Hungary
15 (9,775%): Romania
7 (2,288%): Thailand
7 (2,288%): Surinam
3 (2,185%): Brazil
3 (1,810%): Poland
3 (1,471%): Indonesia
2 (1,320%): Russia
2 (1,209%): Spain
2 (0,980%): Netherlands Antilles
1 (0,763%): Dominican Republic
1 (0,719%): Portugal
1 (0,660%): Bulgaria
1 (0,660%): Lituania
1 (0,654%): Morocco
2 (0,654%): Germany
1 (0,490%): Italy
1 (0,490%): Austria
1 (0,490%): Japan
1 (0,327%): "Hindustani"

Among the escorts I didn't often notice prostitutes naming different nationalities to clients. It happens three times:
(2x) Russia = Hungary (where I find Russia the most obvious country of origin, in these cases the prostitutes worked for
(1x) Romania = Hungary (this was also at, the Romanian pornstar Angelika Black works for this agency as a callgirl, location: Budapest, Hungary)

Also among the Dutch escort prostitutes I didn't notice many of foreign descent, only 7 (of 130)
2 Spain
1 Morocco
1 Indonesia
1 Surinam
1 "Hindustani"
1 Asia

Also among escort prostitutes, unsafe sex seems to be the standard.

Of 306 escort prostitutes:
54,575%: Blowjob without condom
74,837%: kissing
67,320%: Cunnilingus
16,993%: anal with condom
0,654%: anal without condom
12,745%: rimming (buttlicking)
20,261%: facial
2,288%: coitus without condom

Of 115 Eastern European escort prostitutes:
52,174%: blowjob without condom
81,739%: kissing
66,957%: Cunnilingus
13,043%: anal with condom
0,000%: anal without condom
11,304%: rimming (buttlicking)
26,087%: facial
0,000%: coitus without condom

Of 17 Latin American escort prostitutes:
58,824%: blowjob without condom
88,235%: kissing
94,118%: Cunnilingus
23,529%: anal with condom
0,000%: anal without condom
17,647%: rimming (buttlicking)
17,647%: facial
5,882%: coitus without condom

Of 130 Dutch escort prostitutes:
62,308%: blowjob without condom
76,154%: kissing
69,231%: Cunnilingus
21,538%: anal with condom
1,538%: anal without condom
15,385%: rimming (buttlicking)
16,923%: facial
4,615%: coitus without condom

Of 234 escort prostitutes younger than 30 (here the age estimates in the review forms are used):
53,846%: blowjob without condom
76,496%: kissing
68,803%: Cunnilingus
17,094%: anal with condom
0,427%: anal without condom
11,538%: rimming (buttlicking)
20,513%: facial
1,709%: coitus without condom

Of 61 escort prostitutes 30 years or older (here the age estimates in the review forms are used):
62,295%: blowjob without condom
77,049%: kissing
68,852%: Cunnilingus
19,672%: anal with condom
1,639%: anal without condom
19,672%: rimming (buttlicking)
22,951%: facial
4,918%: coitus without condom

The escort prostitutes seem to be the youngest of all groups of prostitutes.

Of 157 escort prostitutes who named an age:
average: 25,870 years (SD=6,399)
18-23: 44,586%
24-29: 33,121%
30-39: 18,471%
40 or older: 3,822%

Of 69 Eastern European prostitutes who named an age:
average: 22,820 years (SD=3,165)
18-23: 57,971%
24-29: 39,130%
30-39: 2,899%:
40 or older: 0,000%

Of 8 Latin Amercian prostitutes who named an age:
average: 26,392 years (SD=4,682)
18-23: 25,000%
24-29: 62,500%
30-39: 12,500%
40 or older: 0,000%

Of 69 Dutch prostitutes who named an age:
average: 28,792 years (SD=7,596)
18-23: 33,333%
24-29: 24,638%
30-39: 33,333%
40 or older: 8,696%

The escort prostitutes are more or less as expensive per minute as the window and club workers; around 2 euro per minute. Also among these women you see the phenomenon (as observed among the home workers) that the prostitutes who are reviewed only once are more expensive; that is 2,3 euro per minute. You don't see this among the window and club workers.

The clients stay with the prostitutes for around 85 minutes on average and pay 175 euro on average.

The Eastern European escort prostitutes are more expensive on average, 2,5 euro per minute. The Dutch escorts are cheaper, around 2 euro per minute.

Tuesday, January 27, 2009

Home workers 2008

Now finally the home working prostitutes who are reviewed on These are the prostitutes who usually advertise on the internet (usually websites such as,,,, etc.....), sometimes they don't advertise but have their own network. They receive clients in their own homes, some also do escort (or also work in clubs etc...). Most of these women are Dutch.

I counted 899 home workers. To make the data more comparable I only analyzed the prostitutes who were observed in the period between November the 14th 2007 and November the 14th 2008; that's 491 women.

The clients can fill in review forms where they can group the prostitutes into the following subgroups:
24 (4,888%): Eastern European (for 70,833% a nationality is named)
360 (73,320%): Dutch (99,722%)
20 (4,073%): no group (20,000%)
20 (4,073%): Surinamese (100%)
16 (3,259%): different (50,000%)
12 (2,444%): Latin American (58,333%)
11 (2,240%): African (45,455%)
8 (1,629%): Southern European (75,000%)
7 (1,426%): German (100,000%)
5 (1,018%): Thai (100,000%)
5 (1,018%): "other Asians" (80,000%)
2 (0,407%): Chinese (100,000%)
1 (0,204%): Belgian (100,000%)

Of 444 (of 491) prostitutes nationalities are named (and here again, in the percentages used I assumed that when no nationality is mentioned the group to which a prostitute belongs in the review form has the same characteristics as of those of whom a nationality is named):
363 (75,416%): The Netherlands
14 (2,851%): Surinam
8 (2,133%): Poland
6 (1,950%): Brazil
3 (1,577%): Bulgaria
6 (1,222%): Germany
4 (1,150%): Hungary
1 (1,018%): Africa
1 (1,018%): Morocco
5 (1,018%): Thailand
2 (0,896%): Kenia
2 (0,896%): India
3 (0,863%): Czech Republic
3 (0,815%): Italy
3 (0,815%): "Hindustani"
3 (0,713%): Indonesia
2 (0,575%): Romania
1 (0,560%): Ghana
1 (0,407%): Denmark
1 (0,407%): Sweden
1 (0,407%): Scotland
1 (0,407%): Austria
2 (0,407%): China
1 (0,407%): Netherlands Antilles
1 (0,407%): "foreign descent"
1 (0,349%): Colombia
1 (0,288%): Turkey
1 (0,272%): Portugal
1 (0,255%): Philippines
1 (0,204%): Lebanon
1 (0,204%): Belgium
1 (0,204%): Sri Lanka

It rarely occured that prostitutes named different nationalities to different clients. Only in three cases (the one on the left I found the most plausible):
Bulgaria = (Hungary)
Bulgaria = (Italy)
Thailand = (Dominican Republic/Portugal)

I also noticed only a few Dutch prostitutes of foreign descent:
only 10 (of 363)
4 Indonesia
1 Morocco
1 Cape Verde
1 "Eastern Europe"
1 Spain
1 "Hindustani"
1 "foreign"

The home workers are the ones of all types of prostitution who engage the most in unsafe forms of sex.
Of 491 home workers:
63,340%: blowjob without condom
72,505%: kissing
76,782%: Cunnilingus
18,126%: anal with condom
2,444%: anal without condom
15,071%: rimming (buttlicking)
19,756%: facial
8,350%: coitus without condom

Of 28 Eastern European home workers:
60,714%: blowjob without condom
75,000%: kissing
89,286%: Cunnilingus
17,857%: anal with condom
0,000%: anal without condom
17,857%: rimming (buttlicking)
7,143%: facial
7,143%: coitus without condom

Of 28 Latin American home workers
60,714%: blowjob without condom
67,857%: kissing
78,571%: Cunnilingus
0,000%: anal with condom
0,000%: anal without condom
3,571%: rimming (buttlicking)
14,286%: facial
3,571%: coitus without condom

Of 363 Dutch home workers
64,187%: blowjob without condom
74,931%: kissing
78,512%: Cunnilingus
19,835%: anal with condom
3,306%: anal without condom
16,253%: rimming (buttlicking)
21,212%: facial
9,642%: coitus without condom

Of 210 home workers younger than 30 (here the age estimates in the review forms are used)
56,667%: blowjob without condom
70,476%: kissing
74,762%: Cunnilingus
18,095%: anal with condom
0,952%: anal without condom
14,286%: rimming (buttlicking)
20,476%: facial
2,857%: coitus without condom

Of 272 home workers 30 years or older (here the age estimates in the review forms are used)
69,118%: blowjob without condom
75,000%: kissing
79,044%: Cunnilingus
18,015%: anal with condom
3,676%: anal without condom
16,176%: rimming (buttlicking)
19,485%: facial
12,868%: coitus without condom

The home workers are often also much older than prostitutes in other types of prostitution. But the ages mentioned are also not reliable, many clients notice that the prostitutes often look 5, 10, 20 years older than they say they are.

Ages mentioned by 253 home working prostitutes:
Average: 33,834 years (SD=10,150)
18-23: 20,553%
24-29: 23,320%
30-39: 28,854%
40 or older: 27,273%

Ages mentioned by 13 Eastern European home working prostitutes:
Average: 29,148 years (SD=7,291)
18-23: 30,769%
24-29: 23,077%
30-39: 38,462%
40 or older: 7,692%

Ages mentioned by 17 Latin American home working prostitutes:
Average: 27,127 years (SD=5,392)
18-23: 35,294%
24-29: 29,412%
30-39: 35,294%
40 or older: 0,000%

Ages mentioned by 193 Dutch home working prostitutes:
Average: 35,587 years (SD=10,380)
18-23: 17,098%
24-29: 21,762%
30-39: 26,425%
40 or older: 34,715%

The homeworkers cost less per minute than window and club prostitutes, some 1,7 euro per minute on average compared to 2,0 for window and club prostitutes. What's funny is that the home workers who receive the least number of reviews are more expensive than the ones who receive a higher number. For the ones who have a low number of reviews (say lower than 8) the price per minute is approximately 2,0 euro per minute, this drops to 1,5 for home workers with a larger number of reviews. This phenomenon is not visible for other form of prostitution. The clients stay approximately for an hour with a home worker and typically pay 106 euro on average.