Surely Celtaddict has become confused? I ahve not re-read the entire thread (but I have read all of it at least once) and as I recollect, it was stated that "tush" in the USA generally follows the Yiddish in meaning "backside" whereas in songs like "tush" it appears to have come to mean "cunt".

However, Frankie goes to Hollywood's "Relax" was a song about gay anal sex.