Complex sentence: While desires are often classified as emotions by laypersons, psychologists often describe desires as different from emotions; psychologists tend to argue that desires arise from bodily structures, such as the stomach's need for food, whereas emotions arise from a person's mental state.
Split into simpler sentences: While desires are often classified as emotions by laypersons, psychologists often describe desires as different from emotions. For psychologists, desires arise from bodily structures, such as the stomach which needs food, whereas emotions arise from a person's mental state.