"The day my mama socked it to the Harper Valley PTA" Harper Valley P.T.A. generated a lot of conversation back then, and I suspect inspired a lot Sunday sermons.
In the 1970s, Riley became a born-again Christian, and started to sing only gospel music; she renounced the song, and has not performed it since. She titled her 1980 autobiography From Harper Valley to the Mountain Top, and released a gospel album in 1981 with the same title.
Funny how times change.