Prison is a place characterized by coercion, so it is usually associated with practice of a specific sexuality, proscribed and highly controlled. If we consider penitentiary institutions as social spaces, we are nevertheless led to question this assertion by considering connections between in-sexuality and out-sexuality. This approach is especially fruitful for the study of sexuality in women prison, which can be understood due to three processes: strengthening and questioning behavior patterns who are traditionally assigned to women, importing and exporting of norms that restrict sexual activity, and discipline and self-control on sexual behaviors. Thus women prison appears as a strong relay of the legitimate contemporary pattern of female sexuality.