Asians give people the impression that they have small eyes and single eyelids, so they should temporarily make their eyes into single eyelids. Including upstairs saying that racist squints imitate, Joey said "I'm not proud of it" when doing this action, which means that although he did, he was not proud of this discriminatory labeling action, not to say that the cast of Friends was discriminatory. Personally, I think many plots of Friends show anti-discrimination behavior.