The aims of this study are to describe the relationship between the entry-exit paths into prostitution among street-involved young women, and to compare the representations of this strategy among young women who have already used prostitution and those who haven’t. Sixteen young street-involved women, aged between 18 and 25 were interviewed in semi-structured individual interviews. Based on a qualitative methodology, two groups of young women were compared: one who reported prostitution practices (9/16) and the other who did not (7/16). Their testimonies highlight the role of precariousness in the street context and the need to meet urgent needs through the use of prostitution. The precarious living conditions make the young women vulnerable to the influence of others in making the use of prostitution more acceptable in order to meet their needs.