A sex position where the male is most likely sitting in a chair. The female then hops on him making sure his dick goes up her ass while doing it. The male then reaches around the female with his hand and starts fingering her. He then coordinates the two motions of his dick going in and out her butt and his finger going in and out her vagina. When the dick goes in the finger goes out and vice versa. Therefore a see-saw motion. The male can then use his other hand for a variety of things, massaging the womens breasts, double fingering, and donkey punching.
Look at those two See-Saw!!!