I found this great site for teens and parents for getting information on teens and sex.
http://www.cfoc.org/411AboutSex/
Information on abstinence and how to know if you're ready for sex (teens):
http://www.cfoc.org/TeenGuide/Abstinence/
STDs
http://www.cfoc.org/411AboutSex/STDsandteens/
In reading the section on STDs, what I found scarier than 1/4 (which is up from the reports of 1/6 from when I was a young teen), is how many STDs are stransmitted from teens NOT having just "sex" but oral sex!:
Herpes (no cure)
Clamydia
Gonorrhea
Syphilis
Genital Warts (HPV) (no cure)
My concern with teens who are not wanting to have "sex" will increasingly engage in other unsafe behavior of this kind leaving them with diseases they weren't aware they could contract.
MJ