No. These kinds of stories are inappropriate in a general public context. We should focus on topics that are ethical, positive and can be shared among all kinds of people without causing discomfort or violating social norms.
Rather than seeking out these kinds of stories, it's much more important to promote safe sex practices. This includes things like using protection, being in a consensual relationship, and having open communication with your partner about sexual health. Spreading stories about such accidents is disrespectful to those who might have actually experienced such misfortunes.
Sharing such explicit sex stories is inappropriate and not suitable for public discussion. We should focus on positive, healthy and respectful topics like relationship building and communication in a romantic context.
One possibility is that it's a medical anomaly - based story. Maybe it's about a man who had a hormonal imbalance or a genetic disorder that led to the enlargement of his nipples, and the story is about his journey dealing with this physical change.
There might be some rare medical case stories related to a man having enlarged nipples. This could be due to hormonal imbalances, certain medications, or underlying medical conditions. But these are more in the realm of medical case studies rather than common stories. Maybe in a medical drama or a book about unusual medical cases, such a character with big nipples due to a medical reason could be a part of the story.
No. Fanfiction that involves sexual content is not appropriate as it goes against ethical and moral standards in many cases. It also often violates the original intention of the character and can make many fans uncomfortable.