Sex-ed is now just Ezekiel 23:20 "There she lusted after her lovers, whose genitals were like those of donkeys and whose emission was like that of horses." (NIV)
Technically their beloved KJV is a bit less graphic, "For she doted upon their paramours, whose flesh is as the flesh of asses, and whose issue is like the issue of horses." But that gets funny in a different way since "asses" as a more common use these days.
If you just look at what Jesus says in the King James Bible, 90% of it is good life advice. I don't want it taught in schools but I think it's still worth reading. I like to quote it in good natured arguments with my Christian friends.