"Promotion" would likely be interpreted in the sense of commercial advertising. A law that reached advocacy of prostitution in the abstract would be clearly un

"Promotion" would likely be interpreted in the sense of commercial advertising. A law that reached advocacy of prostitution in the abstract would be clearly unconstitutional under the standard set by Brandenburg v. Ohio, 395 U.S. 444 (1969). Only speech that proposes a specific illegal act is excluded from First Amendment protection. Pittsburgh Press Co. v. Pittsburgh Commission on Human Relations, 413 U.S. 376 (1973), and United States v. Williams, 553 U.S. 285 (2008).