Green, not red or pink used to be a symbol of love and sexuality.
Generally, we tend to associate red with lust, passion, and desire but it turns out that green also knows a little something about romance and sexuality.
In stories of the medieval period, green represented love and the base, natural desires of man. It was also considered the colour of growing love, and light green clothing was reserved for young women were to be married.
In Persian and Sudanese poetry, dark-skinned women, called "green" women, were considered erotic. Fast-forward to modern times, there is an urban legend that green M&M's are aphrodisiacs. The company however, has pointed out that they are identical in content to all the other colours.