They behave in accordance with what the contrast principle would suggest: Sell the suit first, because when it comes time to look at sweaters, even e… - Robert B. Cialdini

the automatic, fixed-action patterns of these animals work very well the great majority of the time. For example, because only healthy, normal turkey chicks make the peculiar sound of baby turkeys, it makes sense for mother turkeys to respond maternally to that single “cheep-cheep” noise.

The renowned British philosopher Alfred North Whitehead recognized this inescapable quality of modern life when he asserted that “civilization advances by extending the number of operations we can perform without thinking about them.” Take, for example, the “advance” offered to civilization by the discount coupon, which allows consumers to assume that they will receive a reduced purchase price by presenting the coupon.

It is much more profitable for salespeople to present the expensive item first, not only because to fail to do so will lose the influence of the contrast principle; to fail to do so will also cause the principle to work actively against them. Presenting an inexpensive product first and following it with an expensive one will cause the expensive item to seem even more costly as a result — hardly a desirable consequence for most sales organizations.