Boil spaghetti for the amount of time listed on the box.
In a large skillet, heat the oil over medium heat.
Add the garlic and cook 1 minute.
Add the anchovies to the pan, breaking them up with the spoon as they cook. They'll disappear into the oil.
Stir in the red pepper flakes.
Drain the spaghetti and toss with the anchovy and garlic oil to coat all the noodles.
Add parsley to the spaghetti and toss to combine.