"Adult sexuality, in so far as it is restricted by rules designed to maintain the institution of the family and in so far as the desire for sexual satisfaction is diverted and exploited for the purpose of maintaining a socially useful institution, is a clear instance of that subordination of the pleasure-principle to the reality-principle which is repression; as such it is rejected by the unconscious essence of the human being and therefore leads to neurosis."
Norman O Brown Life against Death - The Psychoanalytical Meaning of History (1959) p.24