Pickin' and a-grinnin'

Luke taught himself a new trick last week. We went to the mountains to visit my grandparents (all three were there) and Luke decided this would be a good time to work on his fine motor skills. What kills me is that he does this fluid movement (into nose, slide down into mouth) as if the mouth is the natural progression for boogers. Is this an innate habit, to pick and then to eat? Charming.