Having sex young..

Okay, so I'd like to start off by saying that I'm not trying to offend anyone or bully anyone. I'm just stating how I feel and seeing if there are others out there that feel the same...
I keep seeing all these posts about 14 year olds having unprotected, consensual sex and getting pregnant, then asking all of us "what should I do? I'm not ready to have a kid! I'm in high school!" These posts always shake me up... 
First.. WHY??? Why do these girls so this?? If you think you're adult enough to have sex, you're DEFINITELY adult enough to know that sex (unprotected or not) could lead to pregnancy. I don't see how girls so young can take such a big risk. I'm 17 and have a wonderful boyfriend, but I won't have sex with him because the risk is too much for me. I know that o have a lot of life left to live and raising a baby does not fit into my plans for a looooong time... These girls are making adult decisions so young :( but in that respect, everyone on here should treat those young pregnant girls like the adults they're clearly trying to be. Stop babying them please!!! They have to learn and deal with the consequences of their actions. 
Second, I feel bad for them. They either don't have a parental figure in their life or don't have one that is properly educating them on all of this... And that's sad. Half of me can blame the girls for their actions, but the other half has to blame the adults in their lives. 
Okay, rant over. Please don't attack me in the comments....