They are probably a good sight more expensive there too for the lower service. I don't even try here in the US. Straight to the source in Thailand, you may get some duds in there rarely, but by and large the ones with the kindest smiles have rarely done this monger wrong. Several requiring repeats and one particular young thing, a long weekend resort invitation for use over and over and over.
Here in Sydney we have some working in brothels and I find they are the worst service providers and the biggest starfish. However they make up in their lack of service in that you can pound them in many positions without a single complaint. Unlike their Chinese sisters who tend to provide better service but complain that your big or fuck too long etc.
I fucked in Cambodia and many bargirls do want white baby. I've sprayed inside dozens while mongering there including a handful of Viets. I'm sure some conceived.