Do most oriental girls tend to flirt with a boy even if they (girls) are taken ?

Some women just flirt, regardless of their race, it has nothing to do with being oriental. BTW having a boy friend does not mean she can't change her mind and be interested in knowing you or any other men better, after all that's what young people do all over the free world. Many male have several girl friends or mistresses at the same time, for some humans this is only natural. If you're also attracted to them why don't you give it a try!