The question is always whether making it illegal would make thing worse. But boy, this does make me pause
When Germany legalized prostitution just over a decade ago, politicians hoped that it would create better conditions and more autonomy for sex workers. It hasn't worked out that way, though. Exploitation and human trafficking remain significant problems. Spiegel
Because prostitution is legal in Germany, tour buses full of johns often head for brothels in the country. Many of them offer a flat-rate price for as much sex as they like.