Modesty an Agglomeration of Fears--Children in Relation to Modesty--Modesty in Animals--The Attitude of the Medicean Venus--The Sexual Factor of Modesty Based on Sexual periodicity and on the Primitive Phenomena of Courtship--The Necessity of Seclusion in Primitive Sexual Intercourse--The Meaning of Coquetry--The Sexual Charm of Modesty--Modesty as an Expression of Feminine Erotic Impulse--The Fear of Causing Disgust as a Factor of Modesty--The Modesty of Savages in Regard to Eating in the Presence of Others--The Sacro-Pubic Region as a Focus of Disgust--The Idea of Ceremonial Uncleanliness--The Custom of Veiling the Face--Ornaments and Clothing--Modesty Becomes Concentrated in the Garment--The Economic Factor in Modesty--The Contribution of Civilization to Modesty--The Elaboration of Social Ritual. III. The Blush the Sanction of Modesty--The Phenomena of Blushing--Influences Which Modify the Aptitude to Blush--Darkness, Concealment of the Face, Etc. IV. Summary of the Factors of Modesty--The Future of Modesty--Modesty an Essential Element of Love. THE PHENOMENA OF SEXUAL PERIODICITY. I. The Various Physiological and Psychological Rhythms--Menstruation--The Alleged Influence of the Moon--Frequent Suppression of Menstruation among Primitive Races--Mittelschmerz--Possible Tendency to a Future Intermenstrual Cycle--Menstruation among Animals--Menstruating Monkeys and Apes--What is Menstruation--Its Primary Cause Still Obscure--The Relation of Menstruation to Ovulation--The Occasional Absence of Menstruation in Health--The Relation of Menstruation to "Heat"--The Prohibition of Intercourse during Menstruation--The Predominance of Sexual Excitement at and around the Menstrual Period--Its Absence during the Period Frequently Apparent only. II. The Question of a Monthly Sexual Cycle in Men--The Earliest Suggestions of a General Physiological Cycle in Men--Periodicity in Disease--Insanity, Heart Disease, etc.--The Alleged Twenty-three Days' Cycle--The Physiological Periodicity of Seminal Emissions during Sleep--Original Observations--Fortnightly and Weekly Rhythms. III. The Annual Sexual Rhythm--In Animals--In Man--Tendency of the Sexual Impulse to become Heightened in Spring and Autumn--The Prevalence of Seasonal Erotic Festivals--The Feast of Fools--The Easter and Midsummer Bonfires--The Seasonal Variations in Birthrate--The Causes of those Variations--The Typical Conception-rate Curve for Europe--The Seasonal Periodicity of Seminal Emissions During Sleep--Original Observations--Spring and Autumn the Chief Periods of Involuntary Sexual Excitement--The Seasonal Periodicity of Rapes--Of Outbreaks among Prisoners--The Seasonal Curves of Insanity and Suicide--The Growth of Children According to Season--The Annual Curve of Bread-consumption in Prisons--Seasonal Periodicity of Scarlet Fever--The Underlying Causes of these Seasonal Phenomena. AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE. I.