As part of a crackdown on prostitution, the Justice Department is spending $25 million on "John Schools," allowing men caught in prostitution investigations to avoid criminal charges and public exposure. 

Wives and girlfriends never need to know.

Instead in at least six major cities around the country, the men attend a three to six-hour course, where they are instructed on the dangers and harms of prostitution by former prostitutes, prosecutors and health officials.

In Brooklyn, prostitutes are also offered a six-week rehabilitative program to help get them off the streets.

"What usually happens in prostitution stings is that the women are arrested. The women are incarcerated. The women are taken out in handcuffs," says Farley. "The men who buy and use women in prostitution slowly and quietly slink off."