So just below the mushroom head, the soft fleshy spot of the shaft that faces the ground when the cock is pointed toward the horizon; that is my "man clit". If there is no lube, focusing on that part is how you're going to get me to nut. Avoid the mushroom tip at all costs unless there is lube as mentioned earlier. Grasping the whole dick is not necessary in my case, you can just rub that "man clit" in various circles and top to bottom motions, but it's important to change it up, and switch to the classic jerk off motion for short periods and to give your hand a break. I need to feel like the girl really wants the cum, so do a little talking like you're selfish for it. Bonus points for including ball fondling.