[Jestx]

Several factors but mostly supply and demand of the sexual marketplace. I read somewhere that (natural) blonde people are only about 2% of the world's population, so naturally the rare factor is huge. Add in that on a primal level, the blonde hair / blue eye traits are very carefully passed on from generation to the next so perhaps blondes are perceived to be more "selective" of their sexual partners (yeah I know there's plenty of blonde sluts). Considering you were in China, the blonde girl they saw was probably super rare and for Chinese dudes it's certainly at the top of their desirability list.