Although this manuscript was quite far from my own field of expertise, I accepted to act as academic referee for this manuscript because I felt that it was important that this type of manuscript should be published in a open access mode, and that the possibility for further discussions offered by this new journal would be very positive. Although I am reasonably confident that the scientific content and the statistics performed have been conducted appropriately, this does not mean to say that I condone all that this manuscript contains. For example, I am not even convinced that it is right for the law to consider either prostitution or patronizing prostitutes as illegal offences. But this is beside the point. Brewer and his colleagues have clearly worked very hard to gather evidence that can now be interpreted scientifically. PlosOne gives them the means to share this information with the rest of the world, together with their interpretations of this data. I have little doubt that this subject will lead to active debates. But this is exactly what PlosOne is about: Open Acess, and open discussions. I simply urge future contributors to stay as brief and constructive as they can.