Behavioral Psychology, General 

It is in this seminal work that Freud first describes his theories on the development, aberrations, and transformations of the sexual instinct from its earliest beginnings in childhood.In his first essay, “Sexual Aberrations,” Freud treats the deviations of the sex instinct, including general perversions, animals as sex objects, and exhibitionism.The second essay, “Infantile Sexuality,” discusses in detail the three phases of masturbatory activity, the sources and phases of development of the sexual organization, and the interaction of sexual and nonsexual processes.Freud's final essay, “Transformations of Puberty,” discusses the final stage of genital primacy, the many inhibitions, fixations, and deviations in the course of development, the genital zones, the forepleasure principle, and the libido theory.This is the definitive edition of one of Freud's most important works. - from Amzon