Start by bringing a large pot of water to a boil. Season the water with salt.
Add in your pasta, and cook according to directions, al dente.
Before straining the pasta, take two cups of the pasta water out, and set aside.
Add the strained pasta to a large serving bowl. Toss in the pecorino romano cheese, the black pepper, and begin adding in the pasta water until you have a nice smooth sauce. Season with a pinch of salt, taste, and season more if you need to.