X-Factor
Between the Missionary position and the Snow Angel, the man reaches the X-Factor. It’s like the missionary but with the man in a perpendicular position as he lies on top of the woman. A variation of the three positions is to keep on rotating from Missionary to X-Factor, to Snow Angel, then continuing to the X-factor on the other side, and then finally back to Missionary. Very strenuous exercise for the man, while really giving an intense corkscrew. This set or series is easily one of the craziest sex positions.