This is something that we call assisted suicide, and to astound people more there are suicide clinics as well which provide lethal doses and drugs to commit suicide. A doctor intentionally explicates the consultant about the knowledge and means for the same. 90% of oncologists have told about requests received from people (patients) wanting to die. Well yet not legalized in many countries but still laws have made related to the same in many and this profession has hence taken ground in the society.