Researchers have found that people who order a healthy main dish are more likely to order higher calorie side dishes and desserts.

FORBES: The Health Halo Effect: Counteracting Candy With Diet Soda

Lower-calorie servings were defined as sandwiches and entrees containing 500 or fewer calories, beverages with 50 or fewer calories per eight ounces and side dishes, appetizers and desserts with 150 or fewer calories.

WSJ: Low-Calorie Items Fuel Restaurant Sales