When people use threats or violence, to make other people to work as prostitutes, this is called forced prostitution. Forced prositution mostly affects women and children. It is a form of sexual abuse that often occurs together with human trafficking. Violence or force can be in different forms. Sometimes people simply profit from the fact that a person has no other option. Forced prostitution is illegal under customary law, in all countries. The Rome Statute is an international treaty, of 2002. It includes forced prostitution as a war crime, and a crime against humanity.