Sex trafficking in the United States. Forms of sexual slavery can, for example, be practices such as the detention of women in "rape camps" or "comfort stations", forced temporary "marriages" to soldiers and other practices involving the treatment of women as chattel, and as such, violations of the peremptory norm prohibiting slavery. Men, Women and Rape. No 18th or 19th century contraceptive method, assuming the use of one, had anything like the pregnancy prevention ability of modern contraception.