It took him long enough but Patrick finally found his thumb! Just like his daddy, mama, and big brother, he is following in the family tradition of thumb sucking. Lily's soothing technique is a bit abnormal and doesn't involve her thumb at all.
His method is pretty cute - he covers his entire right side of his face with his hand. Unfortunately, he still cannot just put his thumb in his mouth. He stuffs his whole hand in, and through the power of deduction, eventually finds his thumb. It is a messy, slobbery approach. But if it works for him, it works for me.