Wu Hen didn't act impulsively.
He even stepped barefoot into the Bronze Coral Forest, letting the Nether Acid burn his ankles.
From his confrontation with the Black Sky Lord, Wu Hen had realized the most direct and effective way to stimulate his tactile perception: using his own flesh to sense the pain caused by surrounding matter.
Pain has its categories and levels—indeed, once willpower is tempered to a sufficiently high realm, the so-called sense of pain diminishes. It begins to feel more like eating chili peppers: at first, even mild spice can make one sweat profusely; but as the body adapts, heavier spice is needed to excite the nerves, and it even becomes addictive.
Though Wu Hen wasn't a masochist, humanity's genetic programming for pain was designed to evolve stronger combat abilities. Only by fully accepting every instant of pain could the body become sharper, faster, unconsciously avoiding harm while surpassing its limits.
