wow this is veery informative. i wanna say thank you for the vaginal discharge explanation. i've been having it everyday since FOREVER and since i thought cum was only when your having sex or w/e i was too embarrassed to ask anybody about it. i didnt want my mom to think i was sexual or masterbating!
as for the sex thing, since everybody is so interested, the first time is usually painful and you might bleed. the pain varies though, it can either just be a little sting, or it can be like having a finger chopped off.

i dont know why actually, but im guessing because the penis is penetrating the hymen, which is some sort of skin/layer thing that protects your vagina. some girls dont even have hymens anymore, maybe because your born that way, or if your athletic, or if you've been in an accident. this might have to do with the amount of pain you experience...
dont worry! if your first time is with a guy you love and trust (and he should be!!) then you should be able to communicate with each other, so you can tell him to go slow, or not as hard, etc.
after 2-3 times, its all pleasure!

(woopee!) why else would people enjoy having it? and have orgasms? dont worries girls, it only hurts the first time.
-ginger