I just saw this study from CNN saying that one out of every four teenage girls will have an STD by the time she's 19 years old. The most common STD is the HPV virus, which causes cervical cancer. Of course there is an innoculation for this virus, but I'm amazed at how many parents are keeping their daughters from being immunized. My daughter's pediatrician gave her the shots, but she also told me that quite a few parents of teens didn't want their daughters to get the shots because they weren't sure if they were safe (which is a decent excuse in my book) or because they were sure their daughters weren't sexually active (which is an insane excuse). The fact is, most girls are sexually active by the time there are 15. Sex is occurring earlier and earlier and it's not uncommon to hear about 12 year old kids having some sort of sexual contact.
Children don't necessarily understand that oral sex can be just as dangerous as sexual intercourse. My children are very well informed about oral sex because my family just never kept anything having to do with sex from children. It's just the way we do it, and how I grew up. But I am finding more and more that our family is unusual and that many people do not discuss oral sex, or any sex for that matter, with their children. I think that is doing a terrible disservice to kids, especially with sex being so dangerous without the proper precautions.
The CDC recommends annual chlamydia screening for all sexually active women under age 25. It also recommends the three-dose HPV vaccine for girls aged 11-12 years, and catch-up shots for females aged 13 to 26. I wish that people would follow these recommendations. I don't really know how a mother could live with herself if her daughter developed cervical cancer because of a lack of vaccines.