Prostitution law
However, sex worker activists and organizations distinguish between human trafficking and legitimate sex work, and assert the importance of recognizing that trafficking is not synonymous with sex work. The Sex Workers Alliance Ireland organization explains: "victims of human trafficking may be forced to work in industries such as agriculture, domestic service as well as the sex industry. It is critical to distinguish human trafficking, which is a violation of human rights, from voluntary migration." The Open Society Foundations organization states: "sex work is done by consenting adults, where the act of selling or buying sexual services is not a violation of human rights. In fact, sex workers are natural allies in the fight against trafficking. The UNAIDS Guidance Note on HIV and Sex Work recognizes that sex worker organizations are best positioned to refer people who are victims of trafficking to appropriate services."
Sex worker
While demographic characteristics of sex workers vary by region and are hard to measure, some studies have attempted to estimate the composition of the sex work communities in various places. For example, one study of sex work in Tijuana, Mexico found that the majority of sex workers there are young, female and heterosexual. Many of these studies attempt to use smaller samples of sex workers and pimps in order to extrapolate about larger populations of sex workers. One report on the underground sex trade in the United States used known data on the illegal drug and weapon trades and interviews with sex workers and pimps in order to draw conclusions about the number of sex workers in eight American cities. However, studies like this one can come under scrutiny for a perceived emphasis on the activities and perspectives of pimps rather than those of sex workers themselves. Another criticism is that sex trafficking may not be adequately assessed in its relation to sex work in these studies.