Grasp his penis with both hands, one at the bottom of his shaft and the other at the top, including the head. Now, move your hands in a twisting motion in opposite directions. After a few twists, stroke up and down with both hands a few times, then go back to the twisting motions. Repeat this maneuver as often as you like.
Say: “Your cock has grown so big from all of this teasing that I can barely get both hands around it. I can only imagine how much cum is going to explode from it once we finally reach the end. I’d better slow down, or you’ll shoot your load way too soon.”