They say if you go and put your ear to the Heart of the World for long enough you'll hear the name of your soulmate whispered out in its heartbeat. But Yoongi fell asleep on that thing almost every night and he had never heard a word. Not that he's bitter or anything...and his bitterness certainly doesn't drive him to leaving his comfortable home to go out adventuring as a mail currier or anything...not at all. That said there is a distinct possibility that Yoongi is more sarcasm than human.