| 摘要 |
PROBLEM TO BE SOLVED: To provide an ejaculation promotion instrument in which a stimulus by tightening and pressure to male genitalia is not artificial, is a natural stimulus hard to cause habituation and boredom, and an ejaculation promotion effect is higher. ! SOLUTION: An ejaculation promotion instrument comprises a cylindrical interior body 2 made of a flexible material with elasticity and having a male genitalia insertion part, and an exterior body 3 with the cylindrical interior body fitted therein and serving as a case body for covering and holding a shape of the cylindrical interior body. The exterior body is formed of a flexible material and has two or more slit-like though-holes 31 extending from one end side in the longitudinal direction to the other end side. A tightening ring body 4 the position of which is movable in the longitudinal direction is detachably mounted on an outer circumferential surface of the exterior body. The diameter of the exterior body is varied depending on the mounting p |
