It's fine to give someone a treat.
While out on a walk, Jane's daughter saw that the local bakery was having a sale on brownies.
Jane wants to teach her daughter to eat healthily.
Jane tells her daughter that brownies are a sometimes food.
Jane tells her daughter she should never eat brownies, or she'll get fat.
Jane's daughter learns to eat sugar in moderation and maintains an optimal weight.
Jane's daughter becomes very worried about getting fat and develops an eating disorder.