Here's something I found on BkkTonite [
sic.]:
http://www.bangkokeyes.com/bareback.html
This suicidally-inclined guy provides a list of girls he's been with in BKK and whether they let him BB.
8% insisted on condoms
27% initially asked for condoms then caved
66% didn't even ask
(Yeah - I know that's 101%... so sue me
)
What worries me (beyond the fact that BarBackRiders such as this exist) are the 27% who ask to use condoms but don't insist. Those of us who are reassured (a little) by a girl initially asking to use a condom may not pursue the matter further - perhaps assuming she is resolute and never goes without. However, the fact that thay are likely to cave with minimal persuasion from a bareback rider will actually render such girls as dangerous as those (66%) who do not insist in the first place.
The 8% who insist are obviously the best option but how do you ever really know? Answer -
you never do 
K.