CONTENTS.

[PREFACE.]

[CONTENTS.]

[SEXUAL SELECTION IN MAN.]

The External Sensory Stimuli Affecting Selection in Man. The Four Senses Involved.

[TOUCH.]

[I.]

The Primitive Character of the Skin. Its Qualities. Touch the Earliest Source of Sensory Pleasure. The Characteristics of Touch. As the Alpha and Omega of Affection. The Sexual Organs a Special Adaptation of Touch. Sexual Attraction as Originated by Touch. Sexual Hyperæsthesia to Touch. The Sexual Associations of Acne.

[II.]

Ticklishness. Its Origin and Significance. The Psychology of Tickling. Laughter. Laughter as a Kind of Detumescence. The Sexual Relationships of Itching. The Pleasure of Tickling. Its Decrease with Age and Sexual Activity.