Each negative emotion evokes a different combination of bodily and mental effects. Fokkinga and Desmet suggest that experiencing the ensemble of these effects transforms a person's subjective perception of and attitude towards the situation. This transformation is experienced as refreshing, empowering, or exciting. An important factor that determines whether people can enjoy negative emotions is the presence of a protective frame. For instance, encountering a hungry lion becomes exciting and less fearful when that lion is safely locked in a cage. Hence, by creating safe conditions for experiencing negative aspects, designers can make sure that the overall product experience will be pleasant. Fokkinga and Desmet proposed a design approach based on rich experience qualities, derived from combining a positive with a negative emotion, together with the establishment of a protective frame. For instance, in a design brief focused on making people more aware of nutritional information in supermarkets, a designer chose to work with the combination of fascination and disgust. The resulting concept is a digital nutritional assistant for smartphones. When the user starts shopping, a normal looking cartoon character is displayed on the phone, which changes in shape and expression according to the products the user puts in the cart. For instance, selecting many fatty foods will make the character look obese, selecting items with much protein will make the character look more muscular, while picking low-calorie foods will make it look slimmer. In this concept, the fascination for the effect of food on our body is combined with the disgust for some extreme effects, like obesity, anorexia, or huge muscles. The protective frame that makes the product pleasant to use involves displaying simplified cartoons with exaggerated features, instead of realistic pictures of people.