Japan does everything better!

Japan was the leading nation when it came to body modification and mind control science. Take Mrs. Hina here for example.

Mother of three, loving husband, and all gone for the pursuit of cum. And this wasn't her choice (at least initially). Once the Japanese Yakuza got ahold of her, they changed her. First it was drugs, then it was enhancement, then it was mind breaking, and then it was addiction. The perfect control.

No one truly knew exactly how it all worked, except for the scientists who made the technology to do this, but the Yakuza just had the tools. The process was permanent and irreversible. Once a whore, always a whore. And the best part was it was customizable. Sometimes they loved to make sure a woman retained her original personality, unable to tell anyone of their predicament, bodies modified in such a way that made life difficult without collapsing in orgasm. Sometimes they wanted to make a point. The Yakuza had once kidnapped a politician's daughter and held her hostage. By the time they could find her, her body had been changed so drastically, shed never live a normal life again, but the porn would be great.

Mrs. Hina here though was concerned about one thing...

Getting as much cum as possible in her uterus. The Yakuza gave her a cum addiction so strong she'd never have enough. And it was a complete accident that they found her too. Just wrong place, wrong time. Poor Hina... left to roam the streets as a cum bucket.