The document discusses the history and types of subliminal messages. It introduces subliminal messages and describes how they were introduced in 1895 and used in marketing in 1957. It identifies four main types of subliminal messages: visual, images, faces, and emotion-eliciting stimuli. Experiments are described that used positive and negative images to influence emotions, and investigated effects of subliminal sexual stimuli on men and women. The document also discusses author Chuck Palahniuk accusing Walt Disney of including subliminal messages in his movies.