An idiom referring to a predisposition for foods that taste sweet, leading to the inordinate consumption, or desire to inordinately consume, these types of food.

People with a sweet tooth will be heard to leave food on their plates or say things such as, "I'm so full, I can't eat another bite." and then when dessert time rolls around, say, "But I always have room for pie!!!!"

Foods that really make the sweet tooth ache with longing:

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