Okay guys, there ought, in theory, to be triggers here, but it's for science.
Freud believed that all mental illness came from an unresolved Oedipal complex: that is, from a desire to kill your parent of the same sex, and mate with your parent of the opposite sex.
He claimed to find this in the dreams of his neurotic patients. But he also said we know this is so because our own dreams tell us so.
In other words, he based his faith in the Oedipus Complex on the contention that all of us commonly dream of killing one parent and having sex with the other.
So do we? Let's prove or disprove Freud.