THE SEXUAL INSTINCT 248
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.
The Psychology of the Emotions · The Wunder Library — complete classics, free to read, with narration.