Sigmund Freud, a psychologist, suggests that Hamlet has an unconscious desire to sexually enjoy his mother. This links to a theory he created, the 'Oedipus Complex', which suggests that all men unconsciously desire their mothers in a romantic manner. The theory was named after Oedipus, a character in Sophocles' play who has no knowledge about his parentage, murders his father and has multiple children with his mother.