The sexual position of a man sticking his penis in a girls ass while the girl menstruates all over the mans face making the McDouble explaining why the man cums and the woman menstruates. The value meal is represented by the woman's ass being the McDouble, the mans dick being the fries and the woman's period blood being the Coke from McDonalds.
There's three types of people in the world, there's a Single, McDouble, and a Happy Meal. You don't feel good enough for the Happy Meal and you really don't want a Single. You try for the McDouble, and you get a McDouble with a Hair In It.