Scents are usually described in relation to everyday items with an odor, such as spices, flowers, fruits, and even unpleasant ones, such as perspiration. Scent is subjective and is described by each person as either good or bad. Whether you feel a scent is good or bad depends on personal likes, closeness of the scent, or emotion. What smells pleasant at a distance may be overpowering at close range. Scientists have described several dozen emotional responses to flower scents.
Scents actually have a function, usually for pollination by insects.
The lighter colors of whites, pinks, and yellows have a pleasant but faint fragrance if any. These colors usually attract moths and butterflies for pollination, insects that see rather than smell. Self-pollinating flowers that need no insects for pollination, or flowers attracting bees by sight rather than smell, often have no fragrance. New highly bred cultivars of flowers, often annuals, likewise may not have fragrance. Some plants may use scents as protection from insects, or as protection from drought in hot, arid climates.