TL;DR: We need to overhaul sex ed courses; they're useless and uninformative.
To some degree. As it stands, sex ed is more or less useless in my opinion. A teacher stands up, says that masturbation is normal, maybe rolls a condom onto a banana, and then goes back to teaching a normal class. However, I've known people (who had taken sex ed courses) who still had no idea how to actually go about the act of coitus. I've known people (even girls) who thought that the clitoris was useless and vulgar. I've known people who had absolutely no clue how to use contraceptives to avoid pregnancies or protect themselves from STDs. A lot of men I've known have been positively mystified by the vagina and had no clue how to deal with it. Even after supposedly being educated on the subject, a large number of people I've known had no clue as far as sex and sexuality are concerned.
So should they teach you how to properly get your partner off? No, I don't think so. But should they actually go into greater detail on anatomy and the mechanics of actually having sex? Yes. For the sake of sexual safety at the very least, kids should know BEFORE they start getting it on how to do so without screwing things up, getting pregnant or infected, hurting someone, etc. Granted, it's a difficult position to take (how do you explain to protective parents why your teaching their precious children how to have sex?), but I believe that it's a necessary one.
The problem arises with America's stance on sexuality (if you're not from the US, bear with me here, or just skip onto to a more interesting/relevant post). We, as a culture, glorify sex--in particular women's bodies--but are terrified to actually talk about it openly. It's only very rarely that I've had open discussions with people about the subject (as a man, I can count on one hand the number of women I've talked with candidly about human sexual anatomy). America needs to get over its fears and stop treating sex as a taboo--it's something that just about everyone is going to face/deal with in their lives; an open discussion can only serve to help. Instead, we treat sexuality like this [http://satwcomic.com/it-s-complicated]. Come on, people. Grow up. We've all got genitalia and we all want to use them--so let's face that like adults and talk about it. It'll do us all good.