We are naturally born with it. God actually WANTED us to complain!! He says it teaches us a lesson on self-control. Complaining isn't a good thing, but in some cases, it can be. Let's say a national crisis is going on...and someone complains when no one's doing anything about it...very unlikely but let's just say...then it's a good thing. Complaining to parents, teachers, co-workers, siblings, adults, little children, etc. is a terrible thing. It only teaches/encourages THEM to complain...
Can ya catch my drift?