We Must Not Be of the World | Harold B. Lee

"While we are in the world, we must not be of the world. Any attempts being made by the schools or places of entertainment to flaunt sexual perversions, which can do nothing but excite to experimentation, must find among the priesthood in this church a vigorous and unrelenting defense through every lawful means that can be employed."

Harold B. Lee, Admonitions for the Priesthood of God, 1972 Semiannual General Conference for The Church of Jesus Christ of Latter-day Saints

https://www.churchofjesuschrist.org/study/general-conference/1972/10/admonitions-for-the-priesthood-of-god?id=p49&lang=eng#p49