Reuben described a curious form of masturbation, which although rare, even among homosexuals, is typically found among homosexuals.(1) Occasionally, a homosexual tries to masturbate by lubricating the mouth of a suitable bottle. He forces his penis in, thrusts in and out, and ejaculates. Then he tries to take his penis out. The penis, stimulated by friction against the bottle, gets harder. This squeezes the base of the penis, cutting off its circulation, and makes it impossible for the homosexual to get his penis out. The homosexual ends up in a hospital. The medical community knows this as the penis-in-a-bottle trick.(1) Kamizuru et al described a 38-year-old man with his penis trapped in a milk bottle for 17 hours; they also described 56 other similar cases.(2)


  1. Reuben D. in Everything you always wanted to know about sex but were afraid to ask. [The author is a physician] . ( St Martins Paperbacks, New York, 1999) pp. 156-179.
  2. Kamizuru M, Nakatani T, Maekawa M, et al. [A case of incarceration of the penis]. Hinyokika Kiyo 1988;34(3):514-6.