I start off by tickling and rubbing his balls, occasionally slowly stroking his cock too. I keep him fully aroused as my fingers glide across his nuts and my palms cup his testicles from underneath. He's so hard just from me playing with his balls , so I stark jerking him off with my other hand. My focus is split between tenderly tickling his testicles and stroking his dick. When I think he's ready, I jerk him off fast while cupping his balls, and make him shoot a massive load of cum all over my body.