Dewani was accused of hiring three men, who are serving time in jail, to murder his wife.Another German study showed heavy use of pornography could make some women “hypersexual” - a personality disorder that involves spending excessive time engaged in sexual fantasies and urges or in planning for and engaging in sexual behaviour.What is illegal is forcing other people into prostitution or profiting from doing so.
Leisser, known as The German Master, gave evidence in the Anni Dewani murder trial.
But as Rob Cameron reports, the plan could run into legal difficulties.
Prostitution in the Czech Republic exists in a legal grey area. But neither is offering such a service a legally recognised trade.
He pleaded not guilty to killing his wife Anni in Cape Town in 2010.
Apart from murder Dewani is also charged with kidnapping, robbery with aggravating circumstances, and conspiracy to commit these crimes.