The misguided fostering of sex education in the classroom on the basis that it will lessen sex ignorance and reduce illegitimate pregnancy, venereal disease, and related problems has no basis for sound conclusions. Actual experience has proven the results to be just the opposite.

President Alvin R. Dyer, First Presidency, April 1969 General Conference
https://archive.org/details/conferencereport1969a/page/n57/mode/2up

Comprehensive Sex Education for Teens Is More Effective than Abstinence

AJN, American Journal of Nursing: March 2012 – Volume 112 – Issue 3 – p15
https://journals.lww.com/ajnonline/fulltext/2012/03000/comprehensive_sex_education_for_teens_is_more.5.aspx