 The boil takes a cynical and unscrupulous view of the advertising profession in contrast to Bagley's new-found ethical concerns.Eventually, Bagley decides to have the boil removed in hospital but moments before he is taken into the operating room, the boil quickly grows into a replica of Bagley's head (only with a moustache) and covers Bagley's original head, asking doctors to lance it, which is done since nobody has noticed the switch from left to right nor the new moustache.Bagley, now with the boil head, moustache, and personality (the movie's third personification from Grant after the stressed executive and the raving lunatic) returns home to celebrate his wedding anniversary, with the original head merely resembling a boil on his left shoulder.