Because not everyone are perverts.
They may be trying to be nice to kids, but it still seems weird and inappropriate. I wanna help kids out, but over the internet isn't really the way to do it. It could easily turn bad.
Coz they can.
Basically I would friend anyone who friended me first & did not have lots of "mature experiences" on their profile.
Maybe they're immature ..
Maybe they like to feel like a big shot hanging around with young kids ..
Whatever the reason, it's not good.
Predator or emotionally challenged
I think they would be pidos