A genuine smile will show crinkles around the eyes, but a fake smile does not.
A trick that designers utilize to create an illusion of featherweight airness for summer designs is using crinkles or puckered fabrics or metallics, foils, jacquards, and brocades.
This purse is fashioned in shiny patent leather that actually crinkles with wear, while the inside of the purse is fully lined in satin.