It's funny isn't it that TheShreikingHarpy and I were both interested enough in this thread to do a bit of research. I found lots of interesting research papers, including evidence from surveys of prostitutes, research on johns, police and crime statistics and reviews. All fairly conclusively saying that where prostitution had been legalised (whether totally like Germany or just the "indoors" trade ie brothels) the outcome was very poor. More trafficking, a huge growth in both the legal and illegal market, and plenty of complaints from the prostitutes themselves (esp in the brothel only version). Most also saying that the systems like the UK were also hugely problematic. The only arrangement that has any evidence for a reduction in prostitution, low levels of trafficking, no growth in the underground market and a general level of satisfaction in the arrangements is Sweden. I found this information easily accessible with a couple of simple Google searches.
ShriekingHarpy on the other hand has found none of this, but instead a few sites where you can buy sex from men, a couple of blogs from people who like buying sex from men (johns in other words, why should they be considered any differently if they are female?), and some quotes from a Swedish prostitute, claiming to be oppressed (this in a country where being a prostitute is perfectly legal).
Why should the stats for Sweden be any more iffy than those for anywhere else? In countries where prostitution is illegal surely there should be much more under reporting?
I don't dispute that there might be a small number of men and women who are prepared to accept the risks of prostitution for the cash reward. I think it is highly unlikely that is primarily because they love sex (sex not being hard to obtain in general if you are not very choosy about who you have it with). It's about cash, and people will do all sorts of things for money.
There is however a consistent picture from the research evidence that most prostitutes have experienced abuse in the past and in their working lives, a significant association with drugs, and that it is an industry largely run by organised crime (even where it has been legalised) and highly associated with trafficking and sexual slavery.
So if a small number of "happy hookers" find that they have fewer customers, I really don't see that as a major problem in comparison.