I remember hearing about a Greek myth in my time at college in Detrioit. According to Plato, humans existed with 4 arms, 4 legs, two heads and two faces, but Zeus thought that they were too powerful, and so decided to separate them so that they would not pose any threat to the gods, commending them to spend the rest of their lives searching for their other halves. It was Phichit who reminded me of this when I met Viktor for the first time. (cover art does not belong to me)