strange law suit

I see a lot of strange news stories in this job and this one, which was featured recently in a German newspaper, is up there with the strangest.
A judge in Stuttgart, Germany, is currently trying to decide on a lawsuit in which a man hired his neighbour to impregnate his wife.
It gets weirder.
Demetrius Soupolos, 29, and his former beauty queen wife, Traute, were very keen to have a child together, but Demetrius was Sterile so they began to seek out other possible options.
The option the couple eventually decided on was to hire their neighbour Frank Maus, 34, to impregnate Traute.
Maus, who was already married with two children agreed to do the job for the fee of €2,000. For three evenings a week for the next six months, a total of 72 different times, Maus tried to impregnate Traute.
When his own wife objected, Maus explained that he was "only doing it for the money."
After the unsuccessful six-month period Soupolos insisted that Maus take a medical examination. The doctor concluded that Maus was also sterile, which forced his wife into admitting that their two children did not belong to him.
Soupolos is now suing Maus in an effort to get his money back. Maus' argument is that he did not guarantee conception, only that he would try his hardest.