Did you know that Jungkook has a muscle called the "latissimus dorsi" that protrudes on both sides of his back, and it's the largest muscle in the upper body, the one that gives him the "Cobra back" shape? Achieving this requires years of heavy pull-up exercises and a low body fat percentage to reach this level of width and definition.
This muscle is different in that it needs consistency and high effort, plus it's genetic, meaning another person might put in the same effort but won't get a similar result like Jungkook's, so even his genes are perfect.
Thanks to Jungkook, I've learned about and discovered muscles I didn't even know existed.