Ten weeks before San Francisco shocked the nation by issuing marriage licenses to same-sex couples, the city quietly took another step in America's cultural revolution by liberalizing its massage permit laws to the point where some critics call it de facto legalization of prostitution. Addressing the issue of sex workers in the massage industry, outgoing Mayor Willie Brown, with the nearly unanimous support of the Board of Supervisors, signed a new law Dec. 5 that redefines it as a public health issue rather than a matter of law enforcement. The law went into effect July 1. By removing a requirement...