PERVERSION : The pursuit of "abnormal" sexual objects without repression. Freud at one point lists five forms of perversion, which is to say five ways that an individual "differs from the normal": "first, by disregarding the barrier of species (the gulf between men and animals), secondly, by overstepping the barrier against disgust, thirdly that against incest (the prohibition against seeking sexual satisfaction from near blood-relations), fourthly that against members of one's own sex and fifthly the transferring of the part played by the genitals to other organs and areas of the body" (Introductory Lectures 15.208). He makes clear that a young child will not recognize any of these five points as abnormal—and only does so through the process of education. For this reason, he calls children "polymorphously perverse" (Introductory Lectures15.209).