My Jack does the same thing. Besides sticking his nose up mine, he also sticks his nose into my ears, or tries getting into my eyes...I love it really, except when I'm not expecting it, then it will shock me in a way, and I'll end up sneezing, or have an itch deep in my ear for awhile. I've never figured out what he's looking for. Although when I bottle fed him, the only way he would take the bottle was if he was on my chest, with him on his tummy with his head upright under my chin, and the bottle was usually close around my nose or ear. Maybe he still has a little memory of that and is looking for that mommy security feeling. Kind of like when cats kneed you when they are really comfortable.
