Being asked about receiving CPR is actually a normal and common question that is asked of patients admitted in the hospital.  It is not intended to frighten patients but as disease states advance and patients realize that cure may not be possible, many prefer to be allowed to have a natural death.   Choosing to not have resuscitation attempted is a common choice.  Patients and families that have been educated about their advanced disease stage understand their clinical situation like to know they have options and can still be offered things they can accept.