Nowadays, the knowledge about aids is bigger than it was in the begining of this epidemic in Brazil, in the 80"s. Over the years, prevention campaigns related to sexual diseases have insisted about using condoms to prevent diseases, especially aids. However, the propagation of this knowledge is not enough to make people really act cautiously. Some people, even knowing the risks, keep sexual intercourse without condom, in a practice known as barebacking. This sexual activity, known commonly as desprotected anal intercourse, emerged in the 90"s among homossexuals in the United States, but spread to other countries including Brazil. The aim of this paper was to understand the risk exposure to aids by an activity that propose not to use condom. The interest was to comprehend which psychological aspects were behind the risk behaviour on the context of aids and sexual intercourse without preservative. To do so, we interviewed 5 homossexual boys that practice the bare sex. This review led us to think on barebacking as a transgressive practice that encourages the narcisic omnipotence on subject. As transgression, barebacking represents a sexuality of unlimited access to pleasure, precisely by the removal of condom. The risk, in these cases, is an important part of the fun by representing the possibility to play between care and danger, recovering eroticism as the subject"s sovereignty space.