The way you say that you think Nonito Donaire should retire simply shows that you think his career is over.  I think let us watch from the sideline the outcome if ever Nonito decided to move to lighter weight.  I know he still has that KO punch but then I hope he still retains 90% of his speed.  I think he has an advantage in the lower weight division since I believe he can withstand punches in that division more than his current.