" [A]s we know, the sexual development in childhood determines what direction this new start at puberty will take. Not only will the early aggressive impulses be re-awakened; but a greater or lesser proportion of the new libidinal impulses—in bad cases the whole of them—will have to follow the course prescribed for them by regression and will emerge as aggressive and destructive tendencies. In consequence of the erotic trends being disguised in this way and owing to the powerful reaction-formations in the ego, the struggle against sexuality will henceforward be carried on under the banner of ethical principles. "
― Sigmund Freud , Inhibitions, Symptoms and Anxiety