Cannibalism is a taboo topic in most cultures. It may still be encountered but is rare.
Cannibalism is the eating of human tissue.
Situations where cannibalism may be encountered:
(1) as a ritual with religious or magical significance in certain primitive cultures (with assimilation of another)
(2) in situations of extreme privation and starvation
(3) severe mental illness
Mental illness associated with cannibalism include:
(1) paranoid schizophrenia
(2) substance abuse with psychosis
(3) mixed personality disorder with sadistic and psychopathic features associated with paraphilia
Serial killers such as Jack the Ripper and Jeffrey Dahmer have engaged in cannibalism.