What kind of hellhole is this 4Chan anyway?
Where to begin...
A very politically incorrect message board originally made for anime fans, which is also a spinoff of Something Awful (another very politically incorrect message board). Meme culture essentially started there. I was first exposed to it when I was 11 and frequently posted for about six years or so, when by that time it was mostly just meetup/rate my dick threads. Hence why I'm pretty much desensitized by now to 'shock sites'.
Oh god you've got to be kidding. There are threads where boys ask others to rate their penises? Dear God, Do we need Jesus.
Pubescent boys do this in real life too, but the key word is "pubescent". It's the sort of thing you're supposed to outgrow pretty damn young.