In my professional and personal experience I would say that he is not teething.. Although there have been bubs that teeth this early (some even born with teeth! Ouch!!) it is very rare! And whilst teething symptoms can start quite some time before the teeth actually appear I would say that 11 weeks is waaay too early. I agree with the other girls in that it may just be developmental. Babies use their mouths to explore and maybe that is what he is doing??