Is it normal to bite/chow on things and have an oral fixation?

So I like biting on stuff, usually anything that's soft or gives some sort of feedback when bitten (like a button that clicks or something like that). I used to bite my pencils back in school, and bite the cords from my hoodies and all that. If there's something I find enjoyable biting I'll just bite it non-stop.

I also tend to press my right molars a lot to a point where it kinda hurts, all of the time.