No need to speculate. There are loads of online forums on this i.e. X or reddit with WL comments. It's usually not discriminatory. Fact is in Japan most brothels are for Japanese punters only. It doesnt make sense when working overseas like Australia, but next best thing is opting for Asian only. Got to remember this is a job, they're not looking for a life partner. That being the case then it's much smarter to go Asian only, as Asian guys are typically physically much smaller, known for finishing quickly, less hairy and biologically have less body odur. From what I've experienced it's also not always a blanket ban and if the girl has seen you in person or shop knows you well then there are occasional exceptions. But reality is its the girls call and she is seeing double digit punters a day its only a matter of time til one oversized, hairy, smelly white/black/sub continental turns up and creates a shit experience, which is why many start off seeing most punter types (except Indians) but then eventually switch to Asian only. Basic de risking. Makes complete sense as most of these girls are FIFO seeing on average 10 punters a day for 14 days straight. Thats 140 fucks and a lot of stress on the body, so makes sense to control what they can.