The theory behind space docking stems from the act of excreting whilst weightless in space. Once free of the Earths gravitational field it is required that in order to poo without creating a terrible mess and upsetting your fellow astronauts a simple method of cellophane is used in order to capture the poo. This poo is then jettisoned into space...naturally at such low temperatures of deep space the poo in fact freezes. Space docking refers to excreting in cellophane, freezing the turd over night and then using it to provide anal pleasure to whomever requests to be space docked.
No known examples of space docking. Not many people admit to performing the act.