Watch The Pain of a Baby Tooth for Free: How to Stream the Movie Online at 123Movies. . A young boy through a period of transition. His last baby tooth, which symbolises this period, is sore. He is scared of pulling it out, of saying goodbye to his dead mother and to his childhood. No one understands him, be is deprived from material physical affection. He himself does not understand his father who has brought another woman home. He feels this is an act of betrayal towards his dead mother.