Gentle and teasing to begin with, followed by more consistent strokes. A strong grip that takes command. Attention paid to the head at regular intervals. Varying speeds that bring me to the edge and taper off. Different grips and strokes employed for variety. Lots of oil to make things frictionless. A tunnel formed by both hands as they push downwards over the shaft, with the lower hand being continually passed back over the upper to create a sensation of infinite penetration.