Doing a girl from behind, once you are about to climax pretend to cum by spitting on her back, pull out, then when she turns jizz in her eye.
Little tip...Aim for the middle, you'll both of her eyes.
Spit on the back, empty the sack
She thought I emptied on her back, she wasnt to know it was spit, see turned, then boom!! I emptied my sack in her eyes, the perfect shot.