Its physiology—Its evolution: Instinctive period—Emotional period (Individual choice)—Intellectual period (Platonic love)—Its pathology—How can sexual instinct deviate from the normal course?—Anatomical and social causes—Psychological causes: (_a_) unconscious, (_b_) conscious.
CHAPTER VI. · THE SEXUAL INSTINCT 248
From The Psychology of the Emotions by Théodule Ribot.
