Sex-ed?what's that?

Amongst me and my friends we don't talk about sex and when i try speak out about it they get embarrassed or they just joke about it ,most of my friends are over 15,I'd thought they'd be more mature about it .I remember when i was in seventh grade  our health teacher was gonna teach about sex and how you should protect yourself cause it's only obvious to include tips on safe-sex, she said a bunch of bull and tried avoid words like condoms,semen,vagina-things like that.... we didn't really learn anything.

 When we moved on to the ninth grade there were about 10 pregnant girls in the grade,i blame the school if maybe they'd taught better we'd prevent most of those pregnancies.

Once i tried talking to my dad when i didn't know much about sex, I went up to my parents' room and tried asking ,as soon as i finished he made a lame excuse of having to go to the office cause he forgot something and said "ohh I'm sorry i gotta head down to the office,to get some documents for a meeting tomorrow,but don't worry we'll talk about it later"i guess later hasn't come yet huh? and that's the way we deal with sex-ed in my home then i wanna go learn at school since at home it's no good well guess what i can't because my teacher doesn't know either..who am i supposed to go to?We are in the 21st century shouldn't we be more open about it?