Why do I like to bite things?

Ever since I can remember I like to bite things. Not like people And stuff, just pencils, pens bled up paper ect. I am also one of the people who have the extra long canine teeth (aka Vampire Fangs) people would ask if I would sharpen my teeth to look like fangs or put implants. I just said they are natrully like that. Anyway, some times it's a habbit, if I see something that looks good to bite I want to bite it, I even chew the side of my wooden bed frame some times, bite pillows and chew towles I even chew closed books and the spines of hardcoverd books. Is this just a habbit or something more?