Pulling the ears.
If your baby is not fussy, but is pulling the ears, it could very well be teething!! I questioned it too when Lucas started doing that. I was scare he might have an ear infection, but he wasn't fussy! So either he's teething or just discovering his ears! Those are honestly the only things I think it could be; teething, infection or discovery. There's not much that can go wrong with the ears in my opinion. :)