Havelock Ellis 
Studies in the Psychology of Sex 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Definition of Instinct – The Sexual Impulse a Factor of the Sexual Instinct – Theory Of the Sexual Impulse as an Impulse of Evacuation The Evidence in Support of this Theory Inadequata – The Sexual Impulse to Some Extent Independent of the Sexual Glands – The Sexual Impulse in Castrated Animals and Men – The Sexual Impulse in Castrated 7omen, after the Menopause, and in the Congenital Absence of the Sexual Glands – The Internal Secretions – Analogy between the Sexual Relationship and that of the Suckling Mother and her Child – The Theory of the Sexual Impulse as a Reproductive Impulse – This Theory Untenable – Moll’s Definition – The Impulse ‘of detumescencchthe Im pulse Of Contrectation – Modification of this Theory Proposed – Its Relation to Darwin’s Sexual Selection – The Essential Element in Dar win’s Conception – Summary of the History of the Doctrine of Sexual Selection – Its Psychological Aspect – Sexual Selection a Part of Natural Selection – The Fundamental Importance Of Tumescence – Illustrated by the Phenomena of Courtship in Animals and in Man – The Object of Courtship is to Produce Sexual Tumescence – The Primitive Significance of Dancing in Animals and Man – Dancing is a Potent Agent for Pro ducing Tumescencche Element Of Truth in the Comparison of the Sexual Impulse with an Evacuation, Especially of the Bladder – Both Essentially Involve Nervous Explosions – Their Intimate and Some times Vicarious Relationships – Analogy between Coitus and Epilepsy Analogy of the Sexual Impulse to Hunger – Final Object of the Impulses of Tumescence and Detumescence.