There are a few things that seem to get left out of anatomy, health, or sex ed classes. Things that I learned much later, and wished I had known much earlier. So I'm just going to put them out there...
1) The Fertility Awareness Method (FAM) is not just for avoiding/achieving pregnancy. If you have irregular periods (or even regular ones) it can help you track exactly what is going on with your body from one day to the next, and help you predict--usually with very high accuracy--what day your next menstruation will begin. You don't have to be caught off guard. Ever.
2) A woman is only fertile a few days per cycle. It's also possible to track which days those are by using FAM. With that said, your body wants to get pregnant, even if you don't. It's wired for procreation. During the few days that you are fertile your body does multiple things to encourage pregnancy, including creating natural lubricants, opening the cervix, and having higher libido. So let me repeat, you are only fertile a few days per cycle, but typically your body is trying to beat the odds anyway.
3) Breastmilk doesn't come out of just one little hole--there are several tiny holes (5-10 in fact) on each breast. So if you go to shoot milk across the room (which often happens accidentally!) it may well look something like this ------>
4) Most girls are not symmetrical in their girlie parts. Since most of us don't look at anybody elses parts we don't know this, but yes it's normal. Most girls' breasts are not a 'matched pair' either.
5) At least one in four pregnancies ends in miscarriage. It is almost certain that you or someone you love will miscarry. Be educated. Be sympathetic. Don't pretend it isn't there.