Reach around to stroke him

From Create Your Own Story

You take advantage of his confusion by sneaking up behind him and wrapping both hands around his waits and onto his cock. He is so startled, he jolts back into you and drops his ax. You rest your head on his shoulder, dangerously close to his face, as you begin to jerk him off. He moves forward and tries to shake you off, but you just step with him and continue jerking him. He quickly accepts his new fate. You jerk him off as fast and hard as you can and breath long warm breaths on his neck and ear.