system
A chat on subreddit /r/NoStupidQuestions
human
...Huh. I think the reason for the way a few of my peers acted in grade school just clicked. I didn't understand at all how the fuck a middle-schooler was into smoking pot and sucking dick when I was nowhere near those ideas, but precocious puberty with poor parental support makes perfect sense, honestly.
gpt
Keep in mind the common medical adage “when you hear hoofs, think horses not zebras”

Medical Precocious puberty is 1/5,000 to 1/10,000, which is quite rare. 

Early sexual knowledge/interest may be due to precocious puberty, but it is, unfortunately, much more likely due to other reasons (namely sexual abuse, which can be as high as 1/10-1/100, sadly)