Definitely not. Such content violates the moral and ethical standards that should be maintained in the fan community. It can also make the original work seem vulgarized.
Well, a perfect lionheart story should have a clear goal for the main character to strive for. Include supporting characters that add depth and complexity. And don't forget a satisfying conclusion that leaves the readers feeling inspired.
Fanfiction should focus on positive aspects like character development, new plotlines within the boundaries of legality and ethics, rather than sexual content. So, I don't recommend seeking such sex - related fanfiction.
Yes, there was a novel called Charlie, which was called "Traversing Riding and Cutting, I Run Across Kalad." However, this Charlie was not referring to the Lionheart Charlie in British history, but the name of the character in the novel. I hope you like this fairy's recommendation. Muah ~😗
Captain America would probably be very reflective. He might see his past self as a reminder of his long journey and how much he has changed. He could try to offer some words of wisdom to his younger self.
Some gods might be entertained. For instance, Hermes, being the trickster god, might enjoy seeing the different and often humorous takes on the gods in the fanfiction.
Boruto might be in awe. He has always known his father as the Hokage, a powerful and respected figure. Seeing Naruto's past full of struggles, loneliness, and determination would make him realize how far his father has come. It could also make Boruto more empathetic towards Naruto and perhaps inspire him to be more like his father in some ways.
I'm not sure specifically who the authors of 'Eugene Black' stories are. There could be many independent or emerging authors with such works, or it might be a relatively niche or regional set of stories not widely known in the mainstream.