Soothing the savage beast

Peter has finally followed in his sister's footsteps.  Or thumbs.  Something like that.  Most kids develop a security habit like thumb-sucking early on in their first year.  Petey decided to wait until after his first birthday to develop his.  Does he such his thumb like a normal child?  Of course not.  He has decided his right index finger is the way to go, almost always coupled with some sort of plush animal (which he calls a "buh-buh", no matter what animal it is) clutched in his left arm.