So it is written: "Sow your seed in the morning, and at evening let not your hands be idle, for you do not know which will succeed, whether this or that, or whether both will do equally well." (Ecclesiastes 11:6)
The Bible is actually pretty clear on this one. You're supposed to spackle the visage of that two-dimensional whore with your own contribution, then turn the magazine so that it is perpendicular to the floor, and watch to see if it is your own skeet, or that of your ejaculatory antecessor, triumphs.