The most draconian surgery was the insertion of a metal pin, complemented by a variety of wheels, spurs, or studs, in the central and southern Philippines and parts of Borneo. Pigafetta was the first of the astonished Europeans to describe the practice:
"The males, large and small, have their penis pierced from one side to the other near the head with a gold or tin bolt as large as a goose quill. In both ends of the same bolt some have what resembles a spur, with points upon the ends; others are like the head of a cart nail. I very often asked many, both old and young, to see their penis, because I could not credit it. In the middle of the bolt is a hole, through which they urinate...They say their women wish it so, and that if they did otherwise they would not have communication with them. When the men wish to have communication with their women, the latter themselves take the penis not in the regular way and commence very gently to introduce it, with the spur on top first, and then the other part. When it is inside it takes the regular position; and thus the penis always stays inside until it gets soft, for otherwise they could not pull it out."
The same phenomenon is described by many others...who agree that its purpose was always explained as enhancing sexual pleasure, especially for women. Some peoples of northwest Borneo...continued this practice until modern times, and their oral tradition attributes its origins to a legendary woman who found sexual intercourse without such an aid less satisfying than masturbation.
The same result was obtained in other parts of Southeast Asia by the less painful but probably more delicate operation of inserting small balls or bells under the loose skin of the penis..."they open [the penis] up and insert a dozen tin beads inside the skin; they close it up and protect it with medicinal herbs...the beads look like a cluster of grapes...They make a tinkling sound, and this is regarded as beautiful."
So, gentleman, the next time your wives make some seemingly onerous request regarding their sexual satisfaction, comfort yourself in the knowledge that at least they aren't asking you to nail a spur into your penis or embed a cluster of grapes under the skin.