Let's look more closely at how this mechanism works. The vagus nerve connecting your gut and brain transmits a massive volume of information from the intestines to the brain every second. What's remarkable is that roughly 80% of this communication flows in the gut-to-brain direction. In other words, the gut sends far more messages to the brain than the brain sends down to the gut. Your intuition is the result of the gut gathering information and delivering it upward.
When gut bacteria break down dietary fiber, they produce substances called short-chain fatty acids. These molecules stimulate the vagus nerve, which in turn activates the brain's dopamine-driven reward circuitry. Once that circuitry fires up, a sense of anticipation builds. The thrill you feel before a new experience is a physiological reaction generated by this pathway. Curiosity, in this sense, is more about how your body is wired than about personality.
You can charge into unfamiliar territory not because you are immune to fear. Your brain has a region called the amygdala that registers threat, but in your case, the "anticipation signal" sent from the gut overrides the amygdala's alarm. So you move forward even while feeling some fear. This drive to explore is not a product of willpower—it emerges from gut-brain coordination. Because it is rooted in your body's architecture, it tends to hold up well even as you age.