saying.. "hhAACChhOOO when you Sneeze.." or "Ouucchh" when hurt. its more of a result of a stimulus, caused by countless familiarity, a reflex of the human mind.. because other people say it often, you get to say it yourself, i doubt if a God would appreciate people shouting his name all the time, if there are accidents or untoward incidents.. wouldn't that be too annoying? 100million people per hour saying "Oh My GOd". LOL..