Pheromone-plug-in

We came across this device in a cat-obsessed relative's home. Some pet-owners are worried over pet-stress, since a pet's life is obviously filled with daily stresses, like laying around, eating food, and going back to sleep. So if you plug the Comfort Zone with D.A.P. (Dog Appeasing Pheromone),
and for cats it's the Comfort Zone with Feliway, into a standard socket, the electric diffuser releases the appropriate pheromone to calm and relax your pet. The pheromones are synthetic (they better be) and are developed to mimic a lactating dog or cat, which is supposed to put the animal at ease. Right, that's not creepy at all. Wonder what the long-term effect on humans is of constantly smelling lactating pet pheromones?