Should what happens when you have (STDs, pregnancy) be taught in schools?

I mean, all these girls and guys ask the dumbest questions about STDs, like, can I get pregnant from this, and will I get an STD if I don't do that. And they have the stupidest ideas, mostly handed down from older siblings, such as you can't get pregnant your first time, wear a condom and your guarenteed against everything, when all that's bull. Chlamidia, the 2nd most widespread STD, can be gotten regardless of condoms, or spermicides, and in some cases, those "protections" just add to the possibility of getting the disease! I mean, come on! They just don't tell them exactly what happens from folling around.