This book provides an in depth analysis of sexual perversions, childhood sexuality, and puberty. The chapter sexual perversions analyses the object of sex in individuals, which deviates from norm and choosing children and animals as object of sex. The second chapter childhood sexuality analyses infant sexuality and author’s arguments are strongly supported by the facts like thumb sucking, auto-eroticism and sibling rivalry. Third chapter analyses the transformations of puberty in which adolescent years consolidate sexual identity under the dominance of the genitals.