Aim in the middle of the face around the nose area. This way it's easier to adjust depending where the first spurt goes. Usually I can tell if its going to be a big one or not, but sometimes things like if she moves or if I move can affect the aiming. So with me straddling her, my favorite way to give a facial, if it shoots high into her hair I can aim my penis lower, if it falls short onto her chin its easier to aim higher or move forward to adjust. If she moves or dodges too its easier to make sure she still gets covered if i have to readjust lol