More than two decades after prostitution was legalised in Germany, the issue is once again sparking debate. The conservative opposition in parliament is campaigning to reform the 2002 law that made sex work legal. Former chancellor Angela Merkel's CDU party claims that the goal of improving the situation of sex workers and curbing human trafficking has not been achieved – rather the reverse. According to several studies, the overwhelming majority of women working in prostitution in Germany are in fact under the control of a pimp. Our correspondent Anne Mailliet reports.