[Chapter 10]—Psychology of sex-attraction.
Nature of the instincts, children’s affections, puberty, sex instinct in animals, mechanism of sex activity, emotions of puberty.
[Chapter 11]—Development of reproductive impulse.
Conjugation in unicellular animals, in metazoa, binary fission, budding, sporulation, conjugation in chilodon, in monads, hermaphrodites, self-fertilization, in phanerogamous plants, genitals of plants, sex differentiation, erotic chemotropismus in fishes, birds, mammals, attraction of mates, permanent mating, protection of the young, monogamy.
[Chapter 12]—Sensual love.
Egotism of sensual love, fondness, attachments, hatred.
[Chapter 13]—Sentimental love.
Conscious altruism, mental characters, psychic qualities, true friendship, love and passion, development of individual love, characteristic of the ideal woman’s love, obstructions in the development of love, tension at puberty, reasons for the disturbances in love’s development, disillusion of sensuality.
[Chapter 14]—Eros and libido.
Emotions of Eros and libido, in men, and in women, jealousy, transcendental attraction, two desires of Eros, difference in the two sexes, emotion of jealousy, its causes, vanity, woman’s former love-affairs.