I heard this on the radio about 6 months ago. There have been several cases of guys advertising free rent in exchange for sex and houswork in the newspaper want-ads. The courts have tried going after themfor soliciting prostitution, but I haven't heard an update about what has happened in court.
The Defendants argument is quite simple: This is a common socila arangement that is often struck up in singles bars. A successfull man with a nice place to live simply wants a woman to have sex with and do some chores around the house. Most likely he doesn't have the time to invest in a proper relationship. The young woman is likely short on cash and is going to school or isn't making much money. The relationship allows her to finish school while having a much nicer place to live thatn she would normaly have.
Since it's perfectly legal to strike up this kind of bargian in a singles bar, what is the problem with advertising it in the paper or on the net ??