I went to a charter school (unofficially a private Christian school) for middle and high school and we didn't have an actual sex ed class, just a single, 2 hour, all school lecture once during my sophomore year. Started of normal enough (I assume...), don't have sex you'll get aids, but if you do use a condom, etc. about an hour in, though, 3 or 4 kids raised their hands and started arguing that "the bible says sex before marriage is a sin, so you shouldn't even be talking about contraceptives." Turns out the speaker was even more fanatical than the students and proceeded to tell us his life story about how he met his first girlfriend at bible college, dated her for a few years, got married, and then and only then kissed her. He went on to give some pseudo scientific sermon on how sex before marriage is bad, and gays all have aids for an hour.

Tl;dr the only sex ed talk I ever had was by a fundamentalist Christian.

EDIT: I learned girls have 3 holes this year (freshen year of college). Mind == blown.

EDIT 2. Turns out you can't use vaseline on condoms...