Unofficial theme song of the police vice squad. It is a play on the title of the 1970s hit song, "Message in a Bottle", ironically made famous by the British pop group, The Police. "Massage in a Brothel" is intended to highlight the preference for some corrupt police to receive payment in the form of sexual services rather than money when soliciting bribes from prostitutes.
Detective Brown won't take money from prostitutes. He prefers a "massage in a brothel".