ABSTRACTTHIS PAPER ANALYZES THE DEBATES ABOUT THE RELATIONSHIP OF SEX-GENDERSEXUALITIES FROM DIFFERENT DISCIPLINARY PERSPECTIVES AND THE CONTRIBUTIONS OF MANY AUTHORS, FROM PRE-SOCRATICS TO R. J. STOLLER AND J. BUTLER. IT RETROSPECTIVELY STUDIES THE STAGES PRECEDING THEEMERGENCE OF GENDER AS A CONSTRUCTION WITH A HIGH MONITORING OF THE SOCIAL NORMS THAT ENCODE BEHAVIORS SO-CALLED “MALE” OR “FEMALE” ACCORDING TO THE ESTABLISHED ORDER: WHOEVER CONTRAVENES THIS DOGMA IS OUT OF THE NORM, ABNORMAL; AND THE GHOSTS ASSOCIATED WITH THESE BEHAVIORS. IT CONCLUDES THAT GENDER IS A VARIABLE IN THE CONSTRUCTIONOF SEXUAL IDENTITY. WHATEVER THE GENDER, IT IS INFLUENCED BYFAMILY AND SOCIETY, AND ALL THAT IS DIFFERENT LEADS TO EXCLUSION AND SECLUSION. THE CONSTRUCTION OF GENDER TAKES INTO ACCOUNT THE COMPLEXITY OF SEXUAL IDENTITY, I.E., THE FUNDAMENTAL DISCONTINUITY AMONG BIOLOGICAL SEX, SOCIAL GENDER, SEXUALITY AND DESIRE.KEY WORDS: SEX, GENDER, SEXUALITY, SEXUAL IDENTITY