Pathokinesis is the ability to change people's emotions. Holders of power is only able to manipulate those who are within earshot, and / or field of distance. While developed person can see or potentially hear someone developed person can use the power. That power seen in the cupids. With it, they can manipulate affection in humans, and cause selected people to fall in love with each other. John and Mary Winchester were an example of this, as the Angels needed Sam and Dean to be born. They use a Cupid's Bow to catalyze emotions and relationships among humans.