On a Buenos Aires street corner, a Banksy-style graffiti shows a scantily clad woman leaning provocatively towards the edge of the building. Round the corner, the woman's hands reach out to a pushchair carrying a toddler. This, says the Argentine Prostitutes' Association (Ammar), is the reality of the sex trade in Argentina, where 86% of sex workers are single mothers.
The graffiti is part of a campaign led by Ammar, the first de facto trade union for sex workers in Latin America. For the past 19 years the group has been fighting to change the way society looks upon prostitution and make sex workers aware of their rights.
Ammar helped draft a bill due to be presented in the senate that would class sex workers as self-employed. If it becomes law, it would enable them to register with labour authorities, pay tax and get a pension.