Here's a bit from Andrew Sullivan's blog this morning that explains why black and white images convey emotions (or sexual desire) more powerfully than does color. In an old interview from 1974, musician Brian Eno expounds on his pornography collection: One theory is that black-and-white photography is always more sexy than colour photography. The reason for this is provided by Marshall McLuhan, who points out that if a thing is ‘high definition,’ which colour photography is, it provides more information and doesn’t require participation as much as if it is ‘low definition’.” I.e. a horror play on the radio is always very, very frightening because the imagery is always your own. If you’re choosing your own imagery, you’ll always choose the most frightening, or in the case of pornography, the most sexual. http://dish.andrewsullivan.com/2013/05/04/putting-yourself-in-the-scene/