There are mentions of abstinance education here, but I don't see how that's related. We're not talking about something that has to do with not knowing how to use a condom or anything like that. The situation presented is one in which it is likely they knew quite well how to use contraception, etc, but were simply not aware of the realities of sexuality.
I went to a public school with quite good sex education if I do say so myself (even if the overly candid teacher was a bit embarasing to us 16 year olds at the time). Nonetheless, we didn't have a chapter on proper anal sex. No one taught us that anal sex requires lots of lube and that it is something which takes a fair amount of time and practice before it can be done consistantly. Instead, most exposure to anal sex comes from porn - where most of the time it's just stuck in there with no second thought, not to mention no consideration for any pain it may cause. Likewise, if you watch porn it apparently seems perfectly reasonable to go directly from anal sex to oral sex. Despite my fairly good sex education in HS, I'm pretty sure we didn't discuss this practice
What I'm most interested though is the contribution of pornography to a type of <a href="http://www.psychiatrictimes.com/p010353.html">adonis complex</a>. Sex education - regardless of whether or not it includes abstinance - does not focus on the realities of the sexual EXPERIENCE. The mechanics? Sure. How to prevent pregnancy? Definitely. How long one can expect to last; what a girl should do if she's having a hard time reaching orgasm? No.
Furthermore, like I said, I do think it's good that porn encourages experimentation to a certain degree. But, again, I was never taught in sex ed as far as I remember about the logistics of safe words, the proper materials to use to tie someone up in bed, or the emotional concerns involved with having threesomes.