 Stimuli that are naturally pleasurable, and therefore attractive, are known as "intrinsic rewards", whereas stimuli that are attractive and motivate approach behavior, but are not inherently pleasurable, are termed "extrinsic rewards".Extrinsic rewards (e.g., money) are rewarding as a result of a learned association with an intrinsic reward.In other words, extrinsic rewards function as motivational magnets that elicit "wanting", but not "liking" reactions once they have been acquired.