>>5898181Forbidden hentai fetish. I'm currently working on a way to make it a reality using the dilation and gauging principles we already know about.
The hardest part will be making the initial "piercing" into the nipple. After that you just gauge up slowly like people do with their ears. After you get to the size of a cock dilation will be necessary daily.
That's all assuming we don't have to make a surgical incision to deepen the artificial chasm inside the breast.