As I recall sex-ed from my early teen years (early 80's), I get a sense of overload. Like, yeah, yeah, we know: use a condom. Can we talk about something else please? But, regardless, the basics were there most of us. I only recently learned there was a girl in my class who was clueless when her first period came. She confessed to a friend and that friend put her straight, admittently, after having a 15-minute laughing fit.