I personally think that only sex education that should be taught is a fully comprehensive one that explains everything from the biological urges, the physical mechanics, the emotional aspects to the risks. Arm teens with all the honest and correct information to help them navigate through those early years of sexual exploration. Teens should be taught the truth, not myths. I myself have seen too many people and their sexual relationships destroyed by knowing only misleading information. Some of this information was actually taught to them, some they heard through the old rumor mill in the halls of middle and high school.
A few of the great gems I have heard from friends are:
Masturbation is wrong and you shouldn't do it. It leads to an unhealthy view of sex and possible later sexual problems.
That only true sex intercourse is sex (as in only penis in vagina is defined as a sexual relationship)
That you should wait until you are in love (dammit teens fall in and out of “love” all the time)
That sex is a private matter that shouldn't be discussed.
And I won't even get started on the myths they heard on how to keep from getting pregnant or getting an STD.
Now my mother is a nurse, so when I approached puberty she had my Dr. explain the basics and answer questions that I had. These talks with my Dr. continued well into my teen years. She did this because she felt that the possible embarrassment factor may result in me not asking serious questions about things that I was curious about, or her stuttering as she attempted to answer questions. The ending result was a positive one. I learned about every manner of birth control and their effectiveness. I learned about STD and how they are contracted and how I could limit myself from possible exposure but that only 100% full abstinence(Absolutely no sexual contact ) could guarantee that I wouldn't get pregnant or an STD.
My Dr. explained alternatives to PIV sexual activity. This included dry humping, grinding, mutual masturbation, oral sex, anal sex. He explained the risks(if any) associate with all those also. While I receiving these “lessons” a good friends step mother (who coincidentally is also a nurse) was explaining that we girls had the right to say stop and no. She explained that if a boy kept pushing using the old line “if you really loved me..” That we should always respond back “If you really loved me you would back off.” She also explained to us that if we were to embarrassed to take control of our health and safety by not only acquiring birth control and condoms but also being to afraid to let our Dr's know that we either were or thinking of becoming sexually active then we were not mature enough and ready to be doing said activities.
Another thing is my highschool actually had a comprehensive sex ed course that students (with parental permission of course) could take. My friend and I were both in this class. It lasted the whole school year and was broken down into sections that covered everything from hormonal changes and urges of adolescence, physical anatomy, sexual arousal to sexual health and safety. Lectures were given throughout the year from representatives from the Health Department and a local family planning clinic. These lectures were non biased and very in depth given the range of topics that they covered.
I am glad that I had these options available to me. The stuff that I was taught really came in handy when I was teenager.