No. Tumblr has strict community guidelines, and sex - related fan fiction that is explicit in nature is not allowed as it goes against the platform's standards for a clean and respectful environment.
Definitely not. Workplace is a place for professional interaction. Sharing sexual stories, no matter what form, is disrespectful to others and can lead to various problems, like sexual harassment claims or a negative impact on team morale. We should focus on work - related matters instead.
Sharing such stories is highly inappropriate as it involves private and often vulgar sexual content. We should respect the boundaries of privacy and propriety in society.
Honestly, it's hard to point to famous examples specifically. Since Tumblr has a vast amount of user - generated content, there are likely many such stories floating around, but they may not have reached a level of fame outside of the Tumblr circles that are interested in this particular type of transformation story. It could be that some of the more popular Tumblr blogs dedicated to transformation stories might have some good examples, but without extensive research, it's difficult to name them.
One common theme could be self - discovery. In such stories, the character might be going through a physical change that makes them re - evaluate their identity. Another theme could be the reaction of society to this transformation. Often, these stories explore how others around the transformed character respond, whether it's with fear, acceptance or curiosity.