They are most commonly seen in the form of deeply placed ampallangs, apadravyas, and reverse shaft Prince Alberts.
They are more rare piercings due to associated pain, difficulty, bleeding and long healing times.
Common placement is directly behind the head of the penis, but they can be placed farther back.
In order to prevent blood loss this piercing is usually accomplished with a specially made piece of jewelry that does the piercing and then shortened and remains in place throughout the healing process, as rare as the piercing is, there are very few that succeed in fully healing, the first manner is by cauterization after the jewelry is in its final position whereby the jewelry is heated to a point that it sears the inner tissues of the corpora cavernosa.
They usually pass between or through the two corpora cavernosa and through the corpus spongiosum, often causing a fair amount of bleeding.