Question: who said one man's vulgarity is another's lyric?
Answer: Justice Harlan

"[A]bsent a more particularized and compelling reason for its actions", Harlan continued, "the State may not, consistently with the First and Fourteenth Amendments, make the simple public display of this single four-letter expletive a criminal offense." In his opinion Justice Harlan famously wrote "one man's vulgarity is another's lyric."