Student or Learner
While individuals who break the (often unwritten) rules of society are reproached for their rudeness, ignorance of dress code, unpunctuality, speaking with their mouth full, eating with their fingers, or whatever, they find themselves punished on other ways. Some find to their horror that they have not been promoted; others fail to get what they want.
Could you please tell me what the red part mean?
eating with their fingers=sucking their fingers?
Thanks in advance!