....for those who don't get this....
I sucked my two middle fingers like this for way, WAY, WAAAAAY too long as a child (and by child I mean pushing adulthood).
Griffin has been "exploring" with his hands in his mouth. Usually it's an entire fist or random fingers, sometimes he actually finds his thumb and sometimes he finds these two jewels. (Ohhh, how they soothed me as a child. Memories....)
We're trying to not encourage the finger sucking and pull his hand away from his mouth often. We're fine with the paci option...figuring we can "lose" the pacis at the appropriate age. :)