My is 4 weeks exactly today and yesterday night he smiled at me while he was awake, he was making faces and I tapped his nose and the picture that is included is what I got in response.. and he didn't pass gas or poop.
Then this morning he smiled at me and it lasted more than a few seconds and he was wide awake again. So do you think it is possible he can already be social smiling? I am going to try and make him smile again tonight. I wuv his toothless grins. =)