Naturally straight hair is the absence of bend or curl. It lies flat. In its most healthy state, straight hair appears shinier than any other hair texture because light reflects most off smooth surfaces. It is typically oily because the natural oils secreted from the sebaceous glands get pushed from the root all the way down the hair shaft, eventually causing the hair to become oily from roots to ends. Therefore, straight hair requires shampooing more frequently and products that won’t weigh down the hair.