During the Oedipus complexa boy's sexual energy (libido) is directed towards the phallus (penis) and the boy wishes to possess his mother sexually, seeing the father as a rival.The boy's ego realises that the father is more powerful than himself and starts tofear castration, causing an unconscious conflict which leads to anxiety. The ego resolves this anxiety by repressing (defence mechanism) his feelings for his mother andidentifying with the father(identification with the aggressor).It is here, where the boy will adopt his Father's characteristics (including his male gender characteristics), values, morals and behaviours (internalisation)leading to a masculine identity.