jemmy plainly did n't ; cheerfully stoic , he was ignoring his mother 's determined assault on his private parts with a cold , wet cloth , absorbed in a new song of his own composition , which went along the lines of `` pew , pew , chit , chit , pew , pew ... '' brianna put a stop to this by swinging him up in her arms and sitting down with him in the nursing chair by the hearth .