...Sweet is one of the five main tastes. It has smooth and round notes in its flavor profile. Sweet is a naturally occurring flavor in many foods, including fruits, berries, winter squashes, sugarcane, and honey. The sweet taste in these foods is due to a higher sugar content. Sweetness is characteristic of desserts and is used as an accent in savory foods.
...Spicy is a flavor that brings heat and fire to food by creating a burning sensation in the mouth or sinuses. Spicy flavors come from hot peppers, horseradish, and wasabi. Spicy adds a kick and sometimes complexity to a dish and releases endorphins, creating a mildly addictive quality.