I'm concern

So I'm new on here. I am a little gullible at times. But reading this post and comments I realize that there is quite a girls younger than 17 on here. I'm 22 wile I may not be much older than them I feel extremely weird and conflicted  when they say something about sex. In my eyes they are children to me and want to tell them things. Maybe it's the nurse inside of me that's delt with many teen tragedies surrounding sex at a young age. But I just can't help me wanting to help. Am I the only who feels this way??!