Well I have a baby boy (Gus-Gus)he's 10 weeks oop. He's sweet, isn't scared at all, and has never crabbed at all. Every time I'm holding him he seems to just want to crawl all over me and bite,nibble, chew, and groom my hands, and arms. He doesn't seem very scared, just wants to put his teeth in me every time. He hasn't broke skin, thank god! Now I'm just curious is this normal? Can he be trained not to? Will he grow out of it and should I just let him do his thing and take the bites.

Make a tsssst sound the moment you see him start to nibble or when he nibbles. Let's him know you don't like it and he should stop after a while.

I have heard from people owning them them trying to groom them so if that's the case then he is trying to bond in a way sugar gliders,cats and other animals bond, grooming.

We have a few that like to groom our hair. but only one does soft enough to not have to stop him. The other two groom so hard I think they are pulling my hair out. I would just gently move him away from my head, he will move to the other side and I have to move him away again. He will go away, but seems to like to try to come back for more grooming later.
Last visit to playroom two got on my arm and started biting/grooming my arm skin. They gave me some good marks, so I finally gently moved them away.

Our one girl would pinch bit our arm, this is suppose to be marking us, she only did it a few times then stopped.

But if you have only one glider, he/she may think you are their grooming partner, enjoy!