2.2 Kutah etc.  To commence with, the Bhagavat exhorts Arjuna just by following the worldly (common) practice; but, in due course, He will impart knowledge.  Hence He says 'practised by men of low birth'. 
 Uttering words of ruke such as  'unmanliness' etc., the Bhagavat causes  [Arjuna] to know that he misconceives demerit as meritorious :