The purpose of this article is to analyze the main events and accomplishments of the process leading to the constitution of subjectivity (that is, the process which allows the human being to learn about himself and the other as being two), according to Winnicott’s experience of the emotional development. To study this process, with its main moments and accomplishments, our analysis is based on the meaning given to the use of tattoos and other physical changes in cases involving modifications that are not merely adornments, they are more meaningful and part of the individual’s search of his own identity. By reengaging the process of the constitution of the psychologic subject, the following set of experiences are examined: being, without predicate; being-with, related to the transitional phenomena; being-different-from, when it is possible to accomplish the I AM status, differentiating oneself from the world; and being qualified by a predicate, when the individual reaches integration as a Whole Person, when it is possible to ask about the identity question: I am x (x is a predicate of the I).