Urethral Play

    Play involving the “urethra”, the tube that runs between the bladder and the outside of the body. In men, it emerges at the end of the penis, and in women, just inside the vagina. With the exception of the very end, this tube is sterile, and anything inserted deeper than a few millimeters should be sterile as well. Note: Serious damage can occur by inserting inappropriate devices, using excessive force, or by bad technique. This form of play is extremely dangerous . Not for the novice.  (See also: Catheterization )