Havelock Ellis 
Studies in the Psychology of Sex [PDF ebook] 
Erotic Symbolism; The Mechanism of Detumescence; The Psychic State in Pregnancy

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. IN this volume the terminal phenomena of the sexual pro cess are discussed, before an attempt is finally made, in the con cluding volume, to consider the bearings of the psychology of sex on that part of morals which may be called social hygiene.