WTF IS GOING ON?!!!

So I'm at home made minding my business and I'm scrolling through the community feed to pass time. I don't know why but I keep reading posts about little girls, barely teenagers talking about having sex with their boyfriends and dating older guys and what so not. I really don't want to judge these kids but holy crap! What's going on with this world? I'm not that old myself but when I compare myself to these kids when I was their age, I was still playing with barbie dolls, all I wanted was lip gloss in every colour and flavor. The word sex scared the shit out me until I was 16 or so. Between scared, shocked, mortified, I don't know which emotion I feel when I read these posts. It's become ok for little girls and boys have sex and behave like adults when they're obviously still babies. I'm 22 and the whole concept of life still scares the shit out me. I find it difficult to keep up with the rapid developments in today's society and here these kids are doing all sought of things. You know what though, I really have to applaud them for their bravery if I can call it anything...