Conceived in the birthplace of SM, America, this SM torture play involves pinning a woman to the ground in an inverted state and then hammering in iron pipes to restrain her. Created to satisfy sadistic desires and masochistic wishes, it includes acts like internal ejaculation, guillotine restraint fellatio, prone restraint rape, double penetration with internal ejaculation, etc. The pain from compression and humiliation gradually turns into pleasure, distorting the face.
