Bear Grylls became widely known as a survival television presenter whose on-screen stunts often involved drinking his own urine to stay hydrated, a habit that quickly became a running joke online. The phrase built around that reputation works because it compresses the whole gag into a few seconds, making it easy to reuse in memes, reaction videos, and short edits. Its staying power comes from shock value rather than a single viral moment, since the image of a famous survival expert embracing something so gross remains instantly recognisable to viewers who know the joke.