Merchandisers, by embedding ...

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.
 Wilson Bryan Key

Quotes from the same author

As an individual becomes aware of subliminal phenomena, the shock may cause him some initial physical or emotional discomfort - possibly even concern over his sanity.
 Wilson Bryan Key