Ice cubes likely sell more alcohol for the distilling industry than attractive models in cheesecake poses. The inconspicuous ice cubes often hide the invisible sell - invisible, that is, to the conscious mind.
– Wilson Bryan Key
Merchandisers, by embedding subliminal trigger devices in media, are able to evoke a strong emotional relationship between, say, a product perceived in an advertisement weeks before and the strongest of all emotional stimuli - love (sex) and death.