The scent of lemon usually conjures a fresh, happy, summery feeling. The taste however, is a little bit less comfortable: when you bite into a lemon, your entire face contracts because of the sour pulp. A slice of lemon is an entirely different story. Lemon is a crucial part of many different dishes. Commercially, lemons are also very nifty: by adding a slice of lemon into a drink, people become more thirsty and are more likely to order another drink. Did you know that a lemon has a warming effect, where a lime has a cooling one? Consider tea and spicy food.