[Finicky]

So Titan is 4 months old and he thinks I am his personal play/chew toy I don't have bruises but my hands and arms are chewed up he breaks skin everyday on me my two sons and my wife he doesn't even try to bite I don't know what to do to correct this problem.with me he has to be attached to my arms when i'm with him and i'm the one that feeds him gives him baths exercise car rides everything.some help would be appreciated.