Ours was very tame, the previous owner/breeder had done alot of handling prior to us getting him. I can tell you that once the teeth are in and they are adult sized (the skinks i mean) they have some strong jaws. Just for fun was hand feeding one time and my finger got in the way, pretty good hold they have.
Not sure about teething, i guess that's possible?? Maybe the little bugger is just having some fun with you, play time!