Kamasutra 7.2.21

7.2.21

tataḥ *sīsapatrakarṇikayā vardhayet/

Now, when a young man perforates his lingam he should pierce it with a sharp instrument, and then stand in water so long as the blood continues to flow. At night he should engage in sexual intercourse, even with vigor, so as to clean the hole. After this he should continue to wash the hole with decoctions, and increase the size by putting into it small pieces of cane, and the wrightia antidysenterica, thus gradually enlarging the orifice. It may also be washed with liquorice mixed with honey, and the size of the hole increased by the fruit stalks of the sima-patra plant. The hole should also be annointed with a small quantity of oil.