The harm of prostitution is socially invisible, and it is also invisible in the law, in public health, and in psychology. This article addresses origins of this invisibility, how words in current usage promote the invisibility of prostitution harm, and how public health perspectives and psychological theory tend to ignore the harm done by men to women in prostitution. Literature which documents the overwhelming physical and psychological harm to those in prostitution is summarized here. The interconnectedness of racism, colonialism, and child sexual assault with prostitution are discussed.