The Science of Steel Erections: Viagra, Cialis, and Nature’s Cheat Codes Press enter or click to view image in full size Photo by Deon Black on Unsplash You’ve probably heard of Viagra. Cialis. The little blue pill and its weekend-long cousin. You’ve also probably heard of watermelon as a “natural Viagra.” And you might have rolled your eyes at that one. The truth is these pills are not magic and are not bullshit either. It’s a molecule called nitric oxide. And without it your dick is just a fleshy appendage that pees and gets in the way. Nitric oxide is the ignition switch for your erection. It’s the signal that tells the blood vessels in your cock to open up, flood with blood, and get you hard. No nitric oxide? No erection. Period. The good news? You can boost it naturally. You can also use medications that work with it. And understanding how it all works will make you harder, thicker, and more reliable in bed — without the mystery.…