Psychoanalytic Theories
Oedipal Complex: The belief that little boys resent the relationship that their fathers have with their mothers, and as a result, harbor a latent desire to murder their fathers and marry/engage in sexual relations with their mothers.
Electra Complex: The belief that little girls resent the relationship that their mothers have with their fathers, and as a result, harbor a latent desire to rebel against their mothers and marry their fathers (or someone eerily similar!)