Hold your masturbation hand upside-down, (sort of like the backhand grip pictured above), and wrap your thumb and index finger around the base of your penis as close to your scrotum as possible.
Then, drive the ring down your shaft like a plunger.
難度: ★
方法: 用食指和姆指做出 OK 手勢再握緊陰莖,反手自慰!
簡單來說: 像拿著廁所泵通渠。